sciencealert:This type of rock is called Botryoidal Chalcedony, or Grape Agate - due to it’s small purple ‘grapes’. It’s usually formed off the coast of Indonesia. Amazing! 🍇🍇 📷: NiceTryDisaster/Reddit #grapes #rocks #quartz #science
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from: https://eikuuhyo.tumblr.com/post/160573078792
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