CBJ Assessment and Evaluation 3

Question 1

Which gemstone property is MOST critical to assess before applying heat during soldering near a set stone?

Accepted Answer

Heat sensitivity and thermal shock risk

Answer

Heat sensitivity varies widely among gemstones; some like emerald, opal, and tanzanite can crack or change color with even minimal heat exposure.

Question 2

A ring shank measures 1.2mm at its thinnest point. This assessment indicates:

Accepted Answer

The shank is at high risk of breakage and the customer should be advised

Answer

A shank thinner than 1.5mm is typically considered at-risk for breakage and should be disclosed to the customer before repair or sizing.

Question 3

What does a 'flat' reading on a magnetic tester for a piece marked '925' most likely indicate?

Accepted Answer

The piece may be silver-plated base metal, not sterling silver

Answer

Silver and gold are not magnetic; a magnetic response on a piece marked 925 suggests a ferrous base metal with plating, not genuine sterling silver.

Question 4

When evaluating an antique piece for repair, why is it important to identify the solder previously used?

Accepted Answer

To avoid introducing incompatible solder that could cause joint failure or discoloration

Answer

Mismatched solder flow temperatures or compositions can weaken existing joints or cause visible color differences at repair seams.

Question 5

Which of the following best describes the purpose of a loupe with 10x magnification during gem assessment?

Accepted Answer

To examine inclusions, surface scratches, and chip damage in detail

Answer

A 10x loupe is the industry standard for examining gemstone clarity, detecting chips, abrasions, and inclusions prior to jewelry repair.

(CBJ) Certified Bench Jeweler Practice Test