Education

The Grade-Maker (6.49)

The Grade-Maker (6.49)The grade-maker is the principal inclusion that causes a grade to fall into its predestined category. A large white feather accompanied by many tiny white crystals is a...

Make the Call (6.48)

Make the Call (6.48)After a stone has been thoroughly cleaned, leaving no traces of dust particles, you are ready to grade it. With your 10x loupe, examine the stone through...

Indicating Factors of Assigning a Clarity Grade...

Indicating Factors of Assigning a Clarity Grade (6.47)Most people might assume that clarity grading is strictly based on the amount of inclusions in a diamond. The amount of inclusions is...

Diamond Cleaning (6.46)

Diamond Cleaning (6.46)As discussed several times before, the cleaning process is critical to accurate grading. If the diamond has just been removed from its mounting and is dirty, try rubbing...

Prepare Yourself for Clarity Grading (6.45)

Prepare Yourself for Clarity Grading (6.45)As with proportion evaluation, weight estimation or color grading, you must be alert and careful. More times than not grading is critical in making a...

Color in Rough (7.08)

Color in Rough (7.08)Sometimes when a rough diamond is being cut, the color will improve. The skin on a rough crystal when removed, will sometimes present a much whiter or...