Assignment 15 - Estimating Weight, Recutting, Repolishing

Question 1

How do you evaluate the clarity of mounted diamonds?

Answer 1

A grader can use reflections to see inclusions hidden by prongs.

Question 2

How do you estimate the weight of mounted diamonds?

Answer 2

Estimate with formula and adjust for girdle thickness and fancy cuts.

Question 3

How do you evaluate the color of mounted diamonds?

Answer 3

comparing it to the masterstone by moving the piece to the stone or moving the stone to the piece.

Question 4

How do you evaluate the cut of mounted diamonds?

Answer 4

Same process but might be a bit more difficult. Some measurements will have to be estimated.

Question 5

What are some reasons to repolish or recut a diamond?

Answer 5

Increase value

Question 6

How does recutting change a diamond’s cutting style?

Answer 6

A diamond’s original style largely governs its style when recut.

Question 7

What are some risks of recutting a diamond?

Answer 7

Risk of breaking the stone or losing too much weight.

Question 8

Refinishing a polished diamond to correct minor faults in its clarity of finish

Answer 8

Repolishing

Question 9

Repairing damage or refashioning a polished diamond to improve its clarity, proportions, or color, or to modernize an old-style cut

Answer 9

Recutting

Question 10

Diamond that can be repolished to improve clarity to an Internally Flawless grade

Answer 10

Potential

Question 11

Diamond that can be repolished to improve clarity to a VVS1 or VVS2 grade.

Answer 11

Improvable

Question 12

What is required for weight estimation of a diamond in a bezel setting that covers the girdle?

Answer 12

Estimate girdle thickness (by checking reflections on the pavilion)

Question 13

What is the most common color improvement from recutting?

Answer 13

Remove color zoning.