Ass # 1 - Precious Metals & Manufacturing
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Questions and Answers

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?

<p>925 parts silver and 75 parts copper (C)</p> Signup and view all the answers

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

<p>It is too soft. (B)</p> Signup and view all the answers

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

<p>Gold (D)</p> Signup and view all the answers

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

<p>It tarnishes. (B)</p> Signup and view all the answers

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

<p>Platinum alloy (C)</p> Signup and view all the answers

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

<p>They retain a permanent polish. (A)</p> Signup and view all the answers

Which characteristic is true about pure titanium?

<p>It is highly resistant to scratching. (D)</p> Signup and view all the answers

How is niobium typically joined when making jewelry pieces?

<p>With rivets or tiny screws. (A)</p> Signup and view all the answers

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

<p>Anodizing. (D)</p> Signup and view all the answers

Which statement is true regarding tungsten metal in jewelry?

<p>It is blended with cobalt to form tungsten carbide. (D)</p> Signup and view all the answers

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

<p>Corrosion resistance due to Chromium (A)</p> Signup and view all the answers

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

<p>Niobium (A)</p> Signup and view all the answers

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

<p>Aluminum and vanadium. (D)</p> Signup and view all the answers

Which of the following metals is considered a precious metal?

<p>Platinum (B)</p> Signup and view all the answers

What is metal memory?

<p>The tendency of a metal to return to its previous shape after being bent (A)</p> Signup and view all the answers

Which metal has the highest luster when polished?

<p>Silver (D)</p> Signup and view all the answers

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

<p>It is 75 percent pure (D)</p> Signup and view all the answers

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

<p>Platinum (D)</p> Signup and view all the answers

What characteristic of precious metals contributes to their allure?

<p>Their luster and color (B)</p> Signup and view all the answers

Which of the following statements about base metals is accurate?

<p>They are non-precious metals like copper and zinc (C)</p> Signup and view all the answers

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

<p>It is less rare than gold (D)</p> Signup and view all the answers

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