![]() The 7.7-ounce (217.78 grams) crystal is worth about $1.5 million. The world's largest gold crystal is the size of a golf ball and comes from Venezuela.The gold blocks harmful ultraviolet rays from the sun. Astronaut helmets were equipped with a visor coated with a thin layer of gold.The atomic symbol of gold, Au, comes from the Latin word for gold, aurum.The rest goes to electronics and dental and medical uses. ![]()
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