How do Gemstones get their Colors ? — Know-It-All

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Reblogged this because it’s kinda cool:

The most common cause of color in gemstones is the presence of a small amount of a transition metal ion. Most gemstones are allochromatic, meaning that they are colored by impurities or trace elements in their crystal structure.

via How do Gemstones get their Colors ? — Know-It-All

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