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Phenakite, also spelled phenacite, is a beryllium silicate mineral with the chemical formula Be2SiO4. It commonly forms transparent, colorless crystals but may also appear pale yellow, pink, or brown, and its hardness and relatively high refractive index allow suitable specimens to be cut as gemston...
7.03
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Rare, brilliant collector gem with high refractive index; brittleness, scarcity, and limited jewelry use temper ratings.
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2
Rhodizite is a rare mineral composed primarily of cesium, potassium, beryllium, aluminum, boron, and oxygen. It belongs to the borate mineral group and commonly forms small, colorless to pale crystals. Rhodizite is notable for its high hardness, approximately 8 on the Mohs scale, and has been report...
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