CBJ Assessment and Evaluation 5

Question 1

When evaluating a piece under UV (ultraviolet) light, what information can this provide about a gemstone?

Accepted Answer

Fluorescence characteristics that may help identify the stone or detect treatments

Answer

UV fluorescence can help identify certain gemstones and detect treatments such as fracture filling or certain synthetic materials that fluoresce unusually.

Question 2

A customer's piece is marked '18K GF.' During assessment, the jeweler should communicate to the customer that this means:

Accepted Answer

18 karat gold-filled, which is a base metal with a bonded gold layer, not solid gold

Answer

GF stands for gold-filled, which has a mechanically bonded layer of gold but is not solid gold, affecting repair options and customer expectations.

Question 3

When assessing a multi-stone piece for restringing, which condition requires immediate customer notification before proceeding?

Accepted Answer

Several pearls have drilled holes that are cracked or enlarged

Answer

Cracked or enlarged drill holes weaken pearls structurally and can cause them to split during restringing; the customer must consent before the risk is accepted.

Question 4

Why is it important to assess the crown-to-pavilion ratio of a gemstone before setting it in a bezel?

Accepted Answer

To ensure the bezel wall height will properly secure the stone without covering too much of the crown

Answer

The crown height determines how tall the bezel wall must be to secure the stone; a mismatch results in a loose setting or excessive metal covering the stone's brilliance.

Question 5

During evaluation, a jeweler finds that an enamel inlay on a pendant is cracked. Before quoting a repair, the jeweler should assess:

Accepted Answer

Whether the crack extends to the metal base and the enamel type (cloisonné, champlevé, etc.)

Answer

Crack depth and enamel type determine whether the repair requires local re-firing, complete enamel removal, or a referral to an enamel specialist.

(CBJ) Certified Bench Jeweler Practice Test

(CBJ) Certified Bench Jeweler Practice Test

CBJ Assessment and Evaluation 5