What gives gemstones colors, or rather ... another popular gemstone, derive their lush green color from trace amounts of chromium or sometimes vanadium. Emeralds are a variety of the mineral ...
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35 Most Valuable Gemstones, From Least to Most ExpensiveWhile pearls are considered gemstones, they are not minerals but ... The stone is known for its remarkable ability to change color from green in daylight to red in artificial light.
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