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Which precious metal is named after the Latin word for 'rainbow'?
Answer
Iridium
What material is the International Prototype of the Kilogram made of?
Answer
Platinum-iridium alloy
What is the name of the gold extraction process using sodium cyanide?
Answer
Cyanidation
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Latest trivia questions
Which precious metal is the lightest of the platinum group?
Answer
Palladium
Which precious metal has the chemical symbol Ir?
Answer
Iridium
What material is the International Prototype of the Kilogram made of?
Answer
Platinum-iridium alloy
What is the name of the gold extraction process using sodium cyanide?
Answer
Cyanidation
Which precious metal was named after the asteroid Pallas?
Answer
Palladium
What is the purity in karats of the British Gold Sovereign?
Answer
22 karats
What is the name of the official silver bullion coin of the United States?
Answer
American Silver Eagle
What is the fineness of sterling silver?
Answer
925
Which country holds the largest official gold reserves?
Answer
United States