CDG Risk Assessment & Mitigation 3

Question 1

What is the most effective workspace setup to mitigate the risk of dropping and losing a diamond during grading?

Accepted Answer

Working over a padded, velvet-lined surface with a raised edge

Answer

A padded velvet surface cushions any falls and prevents diamonds from rolling or bouncing off the work area.

Question 2

Which security measure most effectively reduces the risk of internal theft of high-value diamonds in a grading laboratory?

Accepted Answer

Requiring dual control—two-person verification for high-value stones

Answer

Dual control ensures no single employee has unsupervised access to high-value inventory, creating mutual accountability.

Question 3

What physical risk does ultrasonic cleaning pose to certain diamonds?

Accepted Answer

It can extend or worsen existing fractures and feathers

Answer

High-frequency ultrasonic vibration can propagate existing fractures, particularly cleavages and feathers, causing sudden breakage.

Question 4

When transporting diamonds between facilities, which method best mitigates transit risk?

Accepted Answer

Using bonded, insured courier services with full tracking

Answer

Bonded couriers provide insurance coverage and a documented chain of custody, offering both financial protection and accountability.

Question 5

What risk is associated with exposing a fracture-filled diamond to the intense heat of jewelry repair?

Accepted Answer

Melting or vaporization of the glass filler, destroying the clarity enhancement

Answer

The glass or resin used in fracture filling has a much lower melting point than diamond, so heat from soldering or casting destroys the treatment.

(CDG) Certified Diamond Grader Practice Test