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These stones have unique green pigmentation when compared to other turquoise sourced from the region
decays and is exposed to mineral-rich water
frequently complemented by tans
The cabochon you received will not be exactly what is shown in the image
Prehnite 8mm Round AAA Grade - 15-16 Inch featured_08012024 These stones have unique greenPrehnite 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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