Prehnite Natural 8X10mm Freeform Cut - 15-16 Inch Size_20mm A Manganese inosilicate (or chain
Description
A Manganese inosilicate (or chain silicate)
Howlite can be easily dyed and is often treated to be blue for use as a substitute for turquoise
Similar to Tiger's Eye
The stone's composition remains somewhat ambiguous
Prehnite Natural 8X10mm Freeform Cut - 15-16 Inch Size_20mm A Manganese inosilicate (or chainPrehnite 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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