What is this close-up picture? (WotsThat: Amethyst crystal)

Question

What object is shown in this zoomed-in close-up photo?

TerraShift · Accepted Answer

Amethyst crystal. Amethyst is a variety of quartz that gets its gorgeous purple color from iron impurities and natural radiation. Ancient Greeks believed amethyst could prevent intoxication, which is why its name comes from the Greek word for 'not drunken.'

Answer: Amethyst crystal

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