Prehnite 10x14-13x17mm Faceted Tumble Nugget - 15-16 Inch Stone Type_Diopside Goody Beads is your source

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bead measurements

and the material has not been treated with dye

Golden Beryl and Red Beryl

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Prehnite 10x14-13x17mm Faceted Tumble Nugget - 15-16 Inch Stone Type_Diopside Goody Beads is your sourcePrehnite 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.