phenakite

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Scope note
Phenakite or phenacite is a fairly rare nesosilicate mineral consisting of beryllium orthosilicate (Be2SiO4), and occurring as colourless or white scales and prisms, and occasionally used as a gemstone in jewelry. Its name comes from Ancient Greek: phénax, meaning "deceiver" due to its close visual similarity to quartz, named by Nils Gustaf Nordenskiöld in 1833.
phenakite
Accepted term: 03-Feb-2025