Study Questions for Sections 3 & 4
Instructions: Finish answering all the questions before proceeding to the next section. Please do not peek at the answers in the back of your course until you have completed the study test for these sections. Simply circle the correct response letter in these multiple choice questions.
Section 3
3.01
#1 Diamond is pure carbon crystallizing in the ______ system.
A. hexagonal
B. amorphous
C. cubic
#2 Diamond is only one of two gemstones on the planet that consists of a single element.
A. True
B. False
3.02
#1 The isometric (crystal) system consists of three…
A. unequal-length axes perpendicular to each other.
B. equal-length axes perpendicular to each other.
C. cubic axes of equal length.
3.03
#1 A well-formed octahedral crystal is comprised of eight triangular faces.
A. True
B. False
#2 The lines making up the triangles on an octahedral crystal are…
A. predestined facet edges.
B. trigon edges.
C. grains that travel all the way through a diamond crystal in their arranged paths.
#3 How many individual grains exist in a complete diamond crystal?
A. 8
B. 16
C. 12
#4 For a cutter to effectively polish diamond, in which direction will he cut off of a single grain?
A. Parallel
B. Perpendicular
C. 45 degrees
3.04
#1 The Mohs hardness scale is based on…
A. diamond.
B. corundum.
C. resistance of breakage.
#2 The difference in hardness is greater between 9 and 10 than between 1 and 9.
A. True
B. False
#3 Hardness is the resistance of…
A. chipping.
B. scratching.
C. powdering.
3.05
#1 Toughness refers to the resistance of...
A. scratching
B. chipping
C. burning
Section 4
4.01
#1 Carat is a measurement of…
A. weight in the metric system.
B. size in the metric system.
C. gold purity in the metric system.
#2 One carat consists of exactly 1/10 of a metric gram.
A. True
B. False
#3 Points are…
A. 10ths of a carat.
B. 1000ths of a carat.
C. 100ths of a carat.
4.02
#1 A balance scale depends on…
A. electronics.
B. counter weights.
C. a millimeter gauge.
4.03
#1 Diamond size equals diamond weight.
A. True
B. False
4.04
#1 Weight categories are important because as diamonds get larger…
A. they get rarer and as a result more valuable.
B. they get more beautiful and as a result more valuable.
C. they’re more difficult to mine and as a result more valuable.
4.05
#1 The trade values diamonds in…
A. millimeter size.
B. price per carat.
C. total prices only.
#2 Published price guides give exact values for diamonds.
A. True
B. False
#3 Given the same proportions, color and clarity, which one of the following would be the most valuable stone?
A. 1.99 carat
B. 2.00 carat
C. 2.01 carat
#4 Given the same proportions, color and clarity which one of the following would be the most common?
A. 1.99 carat
B. 2.75 carat
C. 2.00 carat
4.06
#1 Which of the following would be a major consideration in planning the saw plane of a rough diamond crystal?
A. The finished colors.
B. The finished weights.
C. The polish and symmetry.
#2 What is the most important feature gained by sawing a crystal off center?
A. Maximum weight retention.
B. Maximum color enhancement.
C. Maximum investment return.
#3 Given the same proportions, color and clarity which set of diamonds would bring maximum value return?
A. 0.97 and 1.53 carats
B. 1.00 and 1.50 carats
C. 0.80 and 1.70 carats
#4 Given the same proportions, color and clarity which of the following diamonds would be the highest price per carat value?
A. 1.99 carat
B. 1.75 carat
C. 1.50 carat
4.07
#1 The least common way of expressing a 1.58 carat is…
A. One-point-five-eight
B. One-fifty-eight
C. One hundred and fifty eight points
#2 The most common way to express a 0.65 carat is…
A. 65 hundredths of a carat.
B. sixty-five-pointer.
C. point-six-five-carat.
#3 The most common way to express a 2.39 carat is…
A. two hundred and thirty-nine points.
B. two carats and thirty-nine points.
C. two-thirty-nine.
#4 Melee (rhymes with “jelly”) is generally considered to mean small diamonds less than…
A. 0.25 carat.
B. 0.18 carat.
C. 0.018 carat.
#5 A grainer represents a…
A. 0.25 carat
B. 0.50 carat
C. 1.00 carat
#6 A four grainer is which of the following?
A. 4.00 carats
B. ¼ carat
C. 1.00 carat
After completing these questions: Go to the answer sheet and see how you did. Remember this is part of the learning process so if your results are disappointing simply reread the sections that you are having difficulty with. After rereading the section and you still do not understand the material, make a note of it below for follow- up at the end of the course.