Study Questions for Section 6
Instructions: Finish answering all the questions before proceeding to the next section. Simply circle the correct response letter in these multiple choice questions.
Section 6
6.01
#1 When using the salt cleaning method you should always…
A. rinse it in water afterward.
B. rinse it in alcohol afterwards.
C. wipe it with a lint free cloth afterwards.
#2 The salt cleaning method is the most thorough.
A. True
B. False
#3 It is possible to cut yourself when cleaning a diamond in salt.
A. True
B. False
6.02
#1 Simply put, clarity is…
A. the quality of being included.
B. the quality of being clear.
C. the quality of being colorless.
6.03
#1 The most used tool in the diamond business is a…
A. 20x loupe.
B. proportionscope.
C. 10x loupe.
#2 The most common type of hand loupe is the…
A. doublet.
B. eye loupe.
C. triplet.
#3 The advantage of an eye loupe is…
A. hands free viewing.
B. more magnification.
C. better optics.
6.04
#1 The inconsistent focal plane on a magnifier lens is known as the…
A. spherical aberration.
B. corrected aberration.
C. primary aberration
#2 In correcting the first lens in a fully corrected triplet loupe it is necessary to…
A. add a second lens.
B. flatten the center of the lens.
C. coat the first lens with anti-polarizing agent.
#3 The chromatic aberration is corrected with the…
A. second lens.
B. first lens.
C. third lens.
#4 Which of the following is the correct lens description for a fully corrected triplet loupe.
A. Two lens consisting of an aplanatic and achromatic.
B. Three lenses consisting of an aplanatic, achromatic and secondary.
C. Three lenses consisting of an aplanatic, achromatic and primary.
#5 Chromatic aberration is…
A. reflection.
B. improper use of the loupe.
C. dispersion.
#6 The chromatic aberration is caused by light waves focusing at one distinct point.
A. True
B. False
6.05
#1 Stereoscopic viewing allows your eyes to…
A. detect depth more easily.
B. detect color more easily.
C. detect dispersion more easily.
6.06
#1 A major advantage of a gem-scope is its…
A. monocular feature.
B. additional scientific applications.
C. dark-field illumination feature.
#2 In viewing a diamond the dark-field illumination is used…
A. occasionally.
B. half the time.
C. often.
6.07
#1 A dark-field loupe can only be used when a diamond is mounted.
A. True
B. False
6.08
#1 Clarity grading is much more ______ than color grading.
A. objective
B. subjective
C. precise
#2 Clarity grading unlike color grading, is more subjective due to the lack of master stones .
A. True
B. False
6.09
#1 The GIA color grading system is the only one used worldwide.
A. True
B. False
6.10
#1 The term pique’ was originally used for…
A. high clarity diamonds.
B. lower clarity diamonds.
C. the French word “pick”.
#2 When someone uses the term pique’ by today’s standards, you can assume it would fall into the ______ category.
A. VVS
B. French cut
C. imperfect
#3 The closest GIA clarity grade equivalent to “pique” is…
A. SI1
B. I1
C. VS1
6.11
#1 Blemishes do not relate to clarity grading.
A. True
B. False
#2 Inclusions are found inside the diamond.
A. True
B. False
#3 Blemishes may occasionally be found inside a diamond.
A. True
B. False
#4 When assigning a final clarity grade this is always performed under…
A. 10x magnification
B. 20x magnification
C. 30x magnification
#5 What is the most important detail before clarity grading a diamond?
A. Make sure it is viewed with a fully corrected triplet loupe.
B. Make sure it is clean.
C. Make sure the dark-field illumination is in the “out” position.
6.12
#1 It is never permitted to view a diamond under 30x magnification while in the process of clarity grading.
A. True
B. False
#2 Which of the following would be the recommended magnifications to start with and then finish with?
A. 10x – 30x
B. 10x – 10x
C. 30x – 10x
6.13
#1 When clarity grading always leave both eyes ______ for comfort and stereoscopic vision.
A. strained
B. open
C. shut
#2 The general rule of thumb is right handed people use their right eye for grading and visa-versa.
A. True
B. False
#3 In using a loupe the focus is achieved in the movement of the…
A. diamond.
B. loupe.
C. neither.
#4 The focal point from the loupe to the diamond is around…
A. 1 inch
B. 2 inches
C. 3 inches
6.14
#1 Locking tweezers are a necessity in the diamond business.
A. True
B. False
#2 Fine point tweezers are generally used for…
A. larger diamonds.
B. melee.
C. fancy shapes.
#3 Medium point tweezers could never be used for large diamonds.
A. True
B. False
#4 It is cautious when picking up a diamond with tweezers to have it resting…
A. on the pavilion.
B. on its table facet.
C. on its culet.
#5 Which of the following circumstances could cause damage with steel tipped tweezers?
A. Contact with a pointed culet and table.
B. Contact with a medium girdle.
C. Contact with a large culet.
6.15
#1 Of the following which is the most important in clarity grading?
A. 30x magnification
B. A good light source.
C. Direct sunlight.
#2 One such method of locating inclusions is to…
A. divide the diamond into imaginary sections.
B. use extremely high magnification first.
C. make sure the dark-field illumination is in the “out” position.
#3 In order to refocus with a loupe at different depths within the diamond being graded, it is necessary to…
A. move your loupe closer.
B. adjust the distance of the diamond and tweezers.
C. change the lenses.
#4 It is acceptable to place a final clarity grade by noting what is visible through the pavilion view.
A. True
B. False
#5 Choose the two most important rules for applying a final clarity grade.
A. What is visible through the pavilion is valid.
B. What is visible through the girdle is valid.
C. Use 10x magnification only.
D. Use 30x magnification only.
E. Get a second opinion.
F. Whatever is visible through the crown is valid.
#6 Sometimes locating a difficult-to-see inclusion from the crown may become much easier through the pavilion view.
A. True
B. False
#7 Some beginning graders confuse tweezers reflection with inclusions.
A. True
B. False
#8 It is never acceptable to zoom a gem-scope’s magnification to 30x during the process of clarity grading.
A. True
B. False
#9 It is considered important to locate inclusions through the pavilion in the process of clarity grading.
A. True
B. False
6.17
#1 Inclusion identification is one method of authenticating diamond.
A. True
B. False
6.18
#1 Bearding is a ______ inclusion.
A. natural
B. blemish-type
C. manmade
#2 The cause of bearding is in the ______ process.
A. crystallization
B. polishing
C. girdling
#3 Bearding is caused by…
A. excessive force in girdling.
B. natural internal inclusions coming to the surface.
C. a careless diamond setter.
#4 Bearding is categorized as inclusion because it is…
A. external.
B. internal.
C. natural.
#5 A rough girdle is always accompanied by a bearded girdle.
A. True
B. False
#6 A faceted girdle will always hide bearding.
A. True
B. False
#7 Bearding has the appearance of…
A. chips.
B. feather-like inclusions.
C. crystal-like inclusions.
#8 Bearding will always lower the clarity grade in SI to imperfect graded diamonds.
A. True
B. False
6.19
#1 A bruise is similar to bearding because they both are caused by…
A. natural formation.
B. impurities.
C. excessive force.
#2 Generally a bruise would be left in a slightly imperfect diamond.
A. True
B. False
#3 A bruise is…
A. an inclusion.
B. a blemish.
C. a natural characteristic.
#4 A bruise can be caused by …
A. excessive contact with the cutter’s scaife.
B. excessive girdling contact.
C. natural formation in the crystallization process.
#5 A bruise travels…
A. on the surface of the diamond.
B. from the surface into the diamond.
C. only on the girdle of a diamond.
#6 Sometimes the geometric shape of the grain in the diamond can be seen on the surface of a bruise.
A. True
B. False
6.20
#1 A cavity can be found in which locations on a diamond?
A. Crown
B. Pavilion
C. Girdle
D. All of the above
#2 A cavity is described the best in which of the following choices?
A. An open inclusion occurring only on the girdle.
B. An indentation traveling just below the surface of the diamond.
C. An internal inclusion threatening to break the surface of the diamond.
#3 A small cavity could never affect the clarity of a diamond.
A. True
B. False
#4 One disadvantage of the presence of a cavity is…
A. the tendency to collect dirt and oil discoloring it.
B. the inevitable danger of growing larger.
C. the automatic reduction of clarity grade to the imperfect range.
#5 What reason would a cutter have in leaving a cavity in a finished diamond?
A. A cavity does not affect the clarity grade since it is a blemish.
B. A cavity never reduces the salability of a diamond.
C. Removing the cavity would cause enough weight loss to devaluate the diamond.
#6 A cavity could never be caused by everyday wear and tear.
A. True
B. False
#7 A cavity that has darkened with age could possibly be cleaned with a strong acid boil.
A. True
B. False
#8 A typical cavity could be caused by an inclusion falling out in the cutting process.
A. True
B. False
6.21
#1 Diamond is the toughest substance on earth.
A. True
B. False
#2 An extremely hard substance is always an extremely tough substance.
A. True
B. False
#3 Diamond can chip partly because of its…
A. lack of hardness.
B. hardness.
C. molecular decay over time.
#4 Diamond’s fracture is considered…
A. even.
B. uneven.
C. smooth.
#5 An uneven fracture is identified by its…
A. step-like pattern.
B. uneven length from one side of the chip to the other.
C. slightly uneven (out of round) smooth chip.
#6 Chips that occur parallel to the cleavage plane will be…
A. very jagged in appearance.
B. similar to a conchoidal fracture.
C. somewhat smooth in appearance.
#7 A diamond’s fracture when present is one identifying feature in the process of authentication.
A. True
B. False
#8 A conchoidal fracture is…
A. uneven.
B. smooth and shell-like in appearance.
C. common in diamond.
#9 Chips can only occur on or around the girdle.
A. True
B. False
#10 A chip is differentiated from a nick by its…
A. location.
B. size.
C. color.
#11 A chip is most likely to occur…
A. between the crown and pavilion, around the girdle.
B. between the table and the crown main facets.
C. in the center of the table.
#12 Which of the following scenarios would be the most likely in causing a chip to eventually occur.
A. An extremely thin girdle with high crown angles and very flat pavilion angles with a feather in the table.
B. An extremely thin girdle with flat crown angles and flat pavilion angles with a feather in the girdle.
C. An extremely thin girdle with flat crown angles and flat pavilion angles with a feather in the culet.
#13 It is possible to chip a diamond with steel tipped tweezers.
A. True
B. False
#14 An “Extremely Thin Girdle” is more likely to chip than a “Thin” girdle.
A. True
B. False
6.22
#1 A cloud or a series of clouds can cause obvious haziness in a diamond.
A. True
B. False
#2 Under very high magnification a cloud is generally…
A. caused by a reaction with the light source.
B. made up of a few small inclusions.
C. made up of many small inclusions that can then be identified.
#3 Clouds can easily be overlooked…
A. if the diamond is not clean.
B. if your grading is rushed.
C. if your light source is inadequate.
D. all of the above.
6.23
#1 Feathers are a common type of diamond inclusion.
A. True
B. False
#2 The two types of feathers are…
A. cleavage and fracture.
B. cleavage and conchoidal.
C. cleavage and uneven.
#3 A cleavage fracture feather runs…
A. parallel to an octahedral face.
B. perpendicular to an octahedral face.
C. in any direction.
#4 A feather that runs parallel to a single grain is a…
A. conchoidal feather.
B. uneven feather.
C. fracture feather.
#5 Which type of feather would cause an uneven appearance if open to the surface?
A. fracture
B. uneven
C. conchoidal
#6 Which type of feather would cause a flatter, smooth appearance if open to the surface?
A. fracture
B. uneven
C. cleavage
#7 An especially dangerous feather is one that is…
A. milky white in color and in the center of the diamond.
B. brownish in color and close to the surface.
C. transparent and in the center of the diamond.
#8 When selling imperfect diamonds included with large feathers it is important to…
A. make sure the feathers are not open to the surface.
B. make sure the feathers aren’t visible to the naked eye.
C. make sure the private party customer understands the potential hazards.
6.24
#1 The terms “clarity enhanced” and “fractured filled” are…
A. two different processes determined by the substance used to fill the diamond’s fracture feathers.
B. both the same.
C. both the same as far as substances but not methods.
#2 Fracture filling is the process of heating and…
A. forcing an oil type of liquid into the open inclusions.
B. forcing a garnet type substance into the open inclusions.
C. forcing a silica type substance into the open inclusions.
#3 In the process of fracture filling the diamond must always be laser drilled first before the filling substance is introduced.
A. True
B. False
#4 In the process of fracture filling the diamond must always have inclusions open to the surface.
A. True
B. False
#5 It has been determined that fracture filling is not necessarily a permanent treatment.
A. True
B. False
#6 Fracture filling is commonly identified by the…
A. open inclusions present.
B. laser drill lines.
C. flash effect.
#7 Which of the following would lead you to believe that a diamond is fracture filled?
A. flash effect.
B. partially transparent inclusions.
C. laser drills.
D. open inclusions.
E. a combination of all of the above.
#8 Proper representation of the presence of fracture filling is only necessary with private party sales.
A. True
B. False
#9 Fracture filled diamonds graded after the treatment is complete are valued…
A. the same as their non-treated counterparts.
B. less than their non-treated counterparts.
C. more than their non-treated counterparts.
#10 The flash effect colors vary in many different hues.
A. True
B. False
6.25
#1 A doubleering is the same as fracture filling.
A. True
B. False
#2 A doubleering is a ______ -like effect in the inclusion.
A. hazy violet
B. rainbow
C. green
#3 A doubleering is a ______ of colors.
A. separation
B. mixture
C. consistency
#4 Fracture filling is what causes a doubleering.
A. True
B. False
#5 Three separate hues of color flash in different locations of a diamond is indicative of…
A. fracture filling.
B. a doubleering.
C. open inclusions.
6.26
#1 Crystals are a very…
A. common type of inclusion.
B. common type of blemish.
C. unusual.
#2 An included crystal is part of the primary diamond crystal that it resides in.
A. True
B. False
#3 There are more than ______ types of crystal inclusions found in diamond.
A. two hundred
B. two dozen
C. two thousand
#4 The most common type of crystal inclusion found in diamond is…
A. garnet.
B. peridot.
C. diamond.
#5 Gas bubbles found in diamond will often be confused with included crystals.
A. True
B. False
#6 Carbon spots are much more common than dark crystals.
A. True
B. False
#7 In identifying a tiny included crystal that initially has the appearance of a bubble under high magnification, it would appear…
A. spherical.
B. geometric
C. metallic.
#8 Most crystals range in color from…
A. white to milky white.
B. white to brownish, grayish or black.
C. grayish to black.
6.27
#1 An indented natural is considered…
A. an inclusion.
B. a blemish.
C. a chip.
#2 Usually indented naturals are left by the cutter for the purpose of…
A. identification.
B. carelessness.
C. weight retention.
#3 An indented natural is caused by the…
A. cutter.
B. the original formation of the rough crystal.
C. excessive force from everyday wear and tear.
#4 An indented natural could be considered the same as a cavity.
A. True
B. False
#5 An indented natural is considered ______ versus a level natural.
A. more acceptable since it is concave
B. more negative since it could collect oils and dirt
C. less negative since it is more rugged
#6 An indented natural is considered less negative than a cavity because…
A. it has already survived the punishment of nature.
B. it won’t collect as much oils and dirt.
C. it always makes less of an indentation in the surface.
#7 An indented natural would have an even greater negative effect if…
A. left enclosed in the girdle.
B. two are left opposite each other enclosed in the girdle.
C. left traveling all the way through the girdle interrupting the outline of the diamond.
6.28
#1 Internal graining is also known as…
A. polishing lines, wisps and knot lines.
B. cutting lines, wisps and knot lines.
C. twinning lines, wisps and knot lines.
#2 Internal graining is caused by…
A. an irregularity in the polishing.
B. feathers.
C. an irregularity in the granular structure.
#3 Internal graining lines and polishing lines both run across several facets in similar patterns.
A. True
B. False
6.29
#1 A knot is more difficult for a cutter to polish because of its granular irregularity.
A. True
B. False
#2 Sometimes a knot cannot be detected until it comes to the surface in the cutting process.
A. True
B. False
#3 If a knot is visible on the surface of the diamond it is considered…
A. an inclusion.
B. a blemish.
C. bruise.
6.30
#1 The most common reason to laser drill a diamond is to…
A. improve the brilliance.
B. lighten the color of a dark inclusion.
C. place a clear identifying characteristic.
#2 A laser drill hole is best when left in a position that is the least visible.
A. True
B. False
#3 The entrances of the original laser drill holes were…
A. much larger.
B. much finer.
C. less burned.
#4 A beginner might mistake a laser drill hole for which one of the following inclusions?
A. Well formed internal crystals.
B. Etch features.
C. Feathers.
#5 Laser drill holes will more often be found in…
A. high clarity diamonds.
B. imperfect diamonds.
C. color treated diamonds.
#6 It is necessary to disclose laser drill lines in which set of the following circumstances?
A. Only if the lines are large enough to be readily noticed under 10x magnification.
B. Only if you are dealing with a private party.
C. Always, under any circumstances.
6.31
#1 A needle is a…
A. very fine LDH.
B. elongated feather.
C. elongated crystal.
#2 In identifying a needle you would look for…
A. an opening to the surface of the diamond.
B. a tunnel like line with pointed ends.
C. an elongated geometric pattern with pointed ends.
6.32
#1 Under higher magnification a pinpoint will be ______ in shape.
A. geometric
B. spherical
C. oval
#2 A beginner could mistake a series of pinpoints for…
A. feathers.
B. LDHs
C. naturals.
#3 With the presence of only a few pinpoints the clarity would likely fall into the VVS category.
A. True
B. False
6.33
#1 Blemishes sometimes occur beneath the surface of the diamond.
A. True
B. False
#2 The more valuable a diamond is, the more likely the choice of removing the blemish in the cutting process.
A. True
B. False
6.34
#1 The most common cause of abrasions is…
A. poor polishing technique by the cutter.
B. natural blemishes occurring in the rough diamond.
C. contact with platinum or gold.
#2 Abraded facet edges can be prevented by cutting a facet…
A. perpendicular to the grain.
B. off grain.
C. parallel to the grain.
#3 It is not possible to cause abrasions on diamonds stored in the same parcel paper together.
A. True
B. False
#4 It is possible to cause abrasions with everyday wear and tear.
A. True
B. False
#5 Abrasion removal generally takes ______ weight loss.
A. moderate
B. very little
C. heavy
6.35
#1 With the presence of a culet facet the round brilliant cut diamond has ______ facets.
A. 56 facets
B. 57 facets
C. 58 facets
#2 It would be considered an extra facet if in the planned placement in a custom cut diamond.
A. True
B. False
#3 Often times an extra facet is caused by the cutter covering up a…
A. large natural.
B. large table.
C. large pavilion main facet.
#4 An extra facet could make the difference between…
A. a Flawless and Internally Flawless.
B. an SI1 and SI2.
C. an ideal cut and near ideal cut.
6.36
#1 Naturals can only be present on the girdle of a diamond.
A. True
B. False
#2 A natural is always considered an inclusion.
A. True
B. False
#3 A cutter usually will not be concerned with large naturals when the diamond is…
A. Imperfect.
B. Flawless.
C. Very Very Slight Imperfections.
#4 The determining factor of the natural affecting the clarity grade is…
A. the flatness of it.
B. the size of it.
C. the presence of trigons.
#5 Large naturals are left by the cutter in order to retrieve maximum weight retention.
A. True
B. False
#6 When naturals are enclosed in the girdle they are considered…
A. blemishes.
B. inclusions.
C. acceptable.
#7 For a natural to never affect the clarity grade it must not…
A. be present in the crown even slightly.
B. be present in the pavilion even slightly.
C. be completely enclosed in the girdle.
#8 It is very common to see ______ naturals for the purposes of weight retention.
A. table
B. opposite
C. microscopic
#9 A trigon is a…
A. triangular impression in a natural.
B. natural inclusion occurring near the surface.
C. triangular octahedral face.
#10 A natural traveling completely through the girdle leaves…
A. a flat spot in the outline of the diamond.
B. an inclusion near the girdle.
C. a very thin girdle.
6.37
#1 The primary difference between a nick and a chip is its…
A. location.
B. grain direction.
C. size.
#2 The most common place for a nick to occur is…
A. the table and star facets.
B. the girdle and culet.
C. between the upper girdle facets and the stars.
#3 The most likely place for a nick to occur after a diamond has been mounted is…
A. pointed culet.
B. a star facet.
C. the girdle.
#4 ______ is an accident waiting to happen.
A. An extremely thin girdle
B. A pointed culet in a mounting
C. A small natural enclosed in the girdle
6.38
#1 A pit is usually caused by…
A. a sharp blow.
B. a very small inclusion opened to the surface.
C. poor cutting technique.
#2 Pits are generally very obvious in appearance.
A. True
B. False
#3 Weight loss in removing a pit is usually severe.
A. True
B. False
6.39
#1 A GIA report that lists a “Good” polish means that it will generally be extremely difficult to locate polishing lines on the diamond.
A. True
B. False
#2 Polishing lines might be caused by…
A. a poorly charged scaife.
B. granular irregularities.
C. either of the above.
#3 Polishing lines can be used to identify diamond because they…
A. all run in different directions.
B. all run parallel to the influencing grain.
C. are always quite obvious.
#4 A GIA report that lists an “Excellent” polish will generally be very easy to locate lines on the surface of the diamond.
A. True
B. False
6.40
#1 Polish marks are usually caused by…
A. granular irregularities.
B. large open feathers.
C. neither of the above.
#2 A common name for polish marks is…
A. knotting.
B. trigons.
C. lizard skin.
#3 Polish marks can look similar to…
A. naturals.
B. a burned surface.
C. cavities.
6.41
#1 A “rough girdle” is considered…
A. an inclusion.
B. a blemish.
C. bearding.
#2 A “rough girdle” is always accompanied with bearding.
A. True
B. False
#3 A “rough girdle” is caused by…
A. crystals coming to the surface.
B. excessive force by the girdler.
C. bearding.
#4 “Rough girdles” are most common in…
A. very valuable diamonds.
B. lower qualities.
C. 5.00 carat diamonds and larger.
#5 The ideal non-faceted girdle is waxy in appearance.
A. True
B. False
6.42
#1 A deep scratch on a diamond is common.
A. True
B. False
#2 Scratches can be caused…
A. by diamonds contacting diamonds.
B. in the final polishing stages.
C. either of the above.
#3 Testing authenticity with a diamond scribe is a prescribed method of choice.
A. True
B. False
6.43
#1 “Surface graining” is caused by…
A. poor cutting technique.
B. an irregularity of the grain.
C. surfacing feathers.
#2 “Surface graining” like polishing lines, run in different directions from one facet to the next.
A. True
B. False
#3 It is unlikely that “surface graining” could be removed by polishing.
A. True
B. False
6.44
#1 Clarity grading is more subjective than color grading.
A. True
B. False
C. The same
6.45
#1 The most important factor before beginning a clarity grading session is to…
A. make sure you have direct sunlight.
B. make sure your mind is alert.
C. always have a second opinion.
6.46
#1 If clarity grading a mounted diamond it is important that you clean the diamond.
A. True
B. False
6.47
#1 It is possible that the same inclusion may be two different grades if in a different location inside the diamond.
A. True
B. False
#2 The same inclusion will approach a higher grade if…
A. it is in the culet.
B. under the table.
C. next to the girdle.
#3 The same inclusion will approach a higher grade if…
A. transparent.
B. light gray.
C. light brown
#4 The most important factors in determining a final clarity grade is…
A. contrast of inclusions.
B. location of inclusions.
C. number of inclusions.
D. integrity of inclusions.
E. all of the above.
#5 The size of the diamond will have an effect on the final clarity grade.
A. True
B. False
#6 A GIA SI1 will never be visible to the naked eye.
A. True
B. False
#7 The brilliance and dispersion of a diamond could aid in masking an inclusion to the naked eye.
A. True
B. False
#8 Durability will always be considered in placing a final clarity grade on a diamond.
A. True
B. False
6.48
#1 When initially viewing a diamond for clarity grading you should first…
A. look through the crown facets.
B. look through the pavilion facets.
C. look through the girdle.
#2 Reflecting light across the surface of the diamond when clarity grading is especially helpful to locate…
A. crystals near the surface.
B. blemishes.
C. internal graining lines.
#3 Many times an inclusion is more easily located from the pavilion than from the crown.
A. True
B. False
#4 Bearding can be located from a ______ view.
A. crown or pavilion
B. parallel girdle
C. none of the above
#5 The final clarity grade is based on…
A. what is visible through the pavilion with 30x magnification.
B. what is visible through the crown with 10x magnification.
C. what is visible through the pavilion with 10x magnification.
#6 Out of the following sets of factors which is the most important in determining the final clarity grade of a diamond?
A. The amount, size, transparency, contrast, location and durability of the inclusions.
B. The amount, size, transparency, eye visibility, location and durability of the inclusions.
C. The amount, size, transparency, contrast, location and type of the inclusions.
6.49
#1 Of the following inclusions which would most likely be the “grade-maker”?
A. A large white crystal in the center of the table.
B. A small transparent cloud near the girdle.
C. Several pinpoints scattered throughout the diamond.
#2 Of the following inclusions which would most likely be the “grade-maker”?
A. A small transparent cloud near the girdle.
B. A natural enclosed in the girdle.
C. An extra facet not visible from the crown.
#3 By removing small white pin points from an “I1” clarity graded diamond what effect would it likely have on the final clarity grade?
A. It would improve it to an SI2 clarity.
B. It would improve it to an SI3 clarity.
C. It would not have an effect.
6.50
#1 Which of the following describes “FL” the most accurately?
A. The diamond is 100% eye-clean.
B. The diamond is void of inclusions and blemishes.
C. The diamond is void of inclusions.
#2 Which of the following describes “IF” the most accurately?
A. The diamond is 100% eye-clean.
B. The diamond is void of inclusions and blemishes.
C. The diamond is void of inclusions.
#3 Typical inclusions in a “VVS1” and “VVS2” would be…
A. a small feather.
B. a dark crystal.
C. pinpoints.
#4 “VS” in clarity grading stands for…
A. very small inclusions.
B. very slightly imperfect.
C. very simple inclusions.
#5 Which of the following would likely be considered a “VS1” clarity?
A. A feather eye-visible through the pavilion.
B. A small transparent cloud by the girdle.
C. A dark crystal reflecting in the pavilion.
#6 An “SI1” inclusion should be quite noticeable under 10x magnification.
A. True
B. False
#7 “SI2” in clarity grading stands for…
A. slightly imperfect
B. small imperfections
C. second imperfection
#8 An “SI2” is always 100% eye-clean.
A. True
B. False
#9 The “SI3” clarity grade is accepted by all diamond grading labs.
A. True
B. False
#10 It is likely that an “SI3” will always be 100% eye-clean.
A. True
B. False
#11 An “SI2” that has suffered from a partial inclusion that has fallen out could be downgraded to an “SI3”.
A. True
B. False
#12 An “I1” clarity grade is never eye-clean.
A. True
B. False
#13 The lowest GIA clarity grade in the imperfect range is…
A. I2
B. I3
C. I4
#14 Imperfections in the “I1 to I3” grades will usually have a negative affect on the brilliance and dispersion.
A. True
B. False