Howlite (Ca,B,Si,O,H) is one of only ~100 different minerals you could find to represent a collection of naturally-occuring Boron, and while this rock in particular is relatively rare, you can still bring this one home!

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Boron does not exist on Earth in pure, elemental form, and boron in rocks is typically found near volcanic and hydrothermal deposits in the form of borax – the same Borax you can buy as a powder in a box for laundry and cleaning.


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