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meaning it becomes magnetically charged from heat or friction
They are all varieties of the mineral corundum
the others being Diamond
pink and mauve
Prehnite with Rutilate 8mm Round - 15-16 Inch Size_4x4-8mm meaning it becomes magnetically chargedPrehnite 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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