Metal Properties and Alloys Flashcards
6 cards from real CBJ practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Metal Properties and Alloys flashcards as text
What karat value represents pure gold?
Answer: 24K
Pure gold is 24 karat, representing 100% gold content with no alloying metals.
Which precious metal used in jewelry has the highest melting point?
Answer: Platinum
Platinum melts at approximately 1,768°C, the highest melting point among common jewelry metals.
What percentage of silver does sterling silver contain?
Answer: 92.5%
Sterling silver is 92.5% pure silver alloyed with 7.5% other metals, typically copper, indicated by the .925 hallmark.
What property describes a metal's ability to be drawn into wire without breaking?
Answer: Ductility
Ductility is the property that allows metal to be stretched or drawn into wire without fracturing.
Which alloying metal primarily gives yellow gold its hardness and warm color?
Answer: Copper
Copper is the primary hardening alloy in yellow gold and contributes to its warm yellow-orange tone.
Which gold alloy exhibits a greenish hue due to a high silver content?
Answer: Green gold (electrum)
Green gold, historically called electrum, is alloyed with a high percentage of silver, which imparts a greenish tint.
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Sources & references
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- jewelers.org — Test delivery, eligibility, fees, passing score, retake fee, retake policy, score release, time limit · verified Oct 2026