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This name is in reference to its easy solubility in acids
Known as "poppy seeds" in Japanese
a green-colored mineral
as waters loosen and decompose the organic elements and replace them with silicate substances
so treat it gently
Prehnite 7x10mm Faceted Tube - 15-16 Inch R1242 This name is in referencePrehnite was the first mineral to be named after a person: its discoverer, Dutch Colonel Hendrik Von Prehn. Von Prehn discovered the stone in South Africa in 1774. Prehnite is translucent to transparent, in colors from light green to yellow green to olive, with occasional inclusions of Black Tourmaline that crisscross the stone in fibrous patterns. It is a phyllosilicate composed of silicon, calcium and aluminum with trace amounts of iron.