Crystal of alexandrite — Photo: Parent Géry · Public domain
Alexandrite
Also known as: Color-change chrysoberyl.
Alexandrite is a mineral variety of Chrysoberyl, with the chemical formula BeAl₂O₄.
It crystallizes in the orthorhombic crystal system.
Key properties: Mohs hardness 8.5; typically green or red or purple.
Collections: Gemstones, Rare & Remarkable.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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