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An orthoproxene mineral
Usually occurring in a deep red color
These mines are also famous for sourcing North-American Jasper
after its type locality
Amber is a yellow
Prehnite 6mm Round Faceted A Grade - 15-16 Inch HPS_07202023 An orthoproxene mineralPrehnite 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.
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