Prehnite 7x10mm Faceted Tube - 15-16 Inch Stone Type_Ruby Zoisite where it gets its name

where it gets its name

A cryptocrystalline Chalcedony

but blends it with browns

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Prehnite 7x10mm Faceted Tube - 15-16 Inch Stone Type_Ruby Zoisite where it gets its namePrehnite 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.