Ass # 1 - Precious Metals & Manufacturing

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Which metal is NOT commonly used in platinum alloys to increase hardness?

Copper

Ruthenium

Aluminum (correct)

Iridium

What is a key characteristic that distinguishes palladium from platinum?

Palladium has a gold color.

Palladium tarnishes more easily than platinum.

Palladium is less expensive than platinum. (correct)

Palladium is denser than platinum.

Which type of gold has an increased amount of copper?

White Gold

14k Yellow Gold

Rose Gold (correct)

Green Gold

Sterling silver is defined as which proportions of silver and copper?

925 parts silver and 75 parts copper Signup and view all the answers

What is the primary disadvantage of pure silver for jewelry use?

It is too soft. Signup and view all the answers

Which of these materials is primarily used in modern vermeil plating?

Gold Signup and view all the answers

What reaction occurs when silver is exposed to sulfur in the air?

It tarnishes. Signup and view all the answers

Which alloy is characterized as consisting of 900 or 950 parts platinum?

Platinum alloy Signup and view all the answers

What is the primary benefit of tungsten carbide rings in jewelry?

They retain a permanent polish. Signup and view all the answers

Which characteristic is true about pure titanium?

It is highly resistant to scratching. Signup and view all the answers

How is niobium typically joined when making jewelry pieces?

With rivets or tiny screws. Signup and view all the answers

What process can be used to produce brilliant colors on titanium and niobium?

Anodizing. Signup and view all the answers

Which statement is true regarding tungsten metal in jewelry?

It is blended with cobalt to form tungsten carbide. Signup and view all the answers

What is a unique feature of stainless steel compared to other metals discussed?

Corrosion resistance due to Chromium Signup and view all the answers

Which of the following materials is most comparable in density to silver?

Niobium Signup and view all the answers

What adds to the durability and scratch resistance of alloyed titanium?

Aluminum and vanadium. Signup and view all the answers

Which of the following metals is considered a precious metal?

Platinum Signup and view all the answers

What is metal memory?

The tendency of a metal to return to its previous shape after being bent Signup and view all the answers

Which metal has the highest luster when polished?

Silver Signup and view all the answers

What does a fineness rating of 750 indicate about a precious metal?

It is 75 percent pure Signup and view all the answers

Which precious metal tends to retain its shape when bent, exhibiting the least metal memory?

Platinum Signup and view all the answers

What characteristic of precious metals contributes to their allure?

Their luster and color Signup and view all the answers

Which of the following statements about base metals is accurate?

They are non-precious metals like copper and zinc Signup and view all the answers

How does silver compare to gold and platinum in terms of rarity?

It is less rare than gold Signup and view all the answers