Chrysoberyl is a hard, tough, and durable gem. Although lacking the fire of other gemstones, Chrysoberyl in its various forms can be quite valuable. Most Chrysoberyl gems are yellow, though some are brown, green, or orange. Chrysoberyl is best known for its important varieties Alexandrite and Cat’s Eye. Alexandrite is a rare and expensive form that exhibits different colours in natural and artificial light. Cat’s Eye is Chrysoberyl that is polished into a cabochon and highly chatoyant, displaying a sharp line of light through the centre of the stone.
Stock sizes: A Selection of single stone specimens are available
Chemical Formula: BeAl2O4
Crystal Structure: Orthorhombic
Colour: Red, Green, Yellow, Orange, Brown, Pink, Grey, Black, Multicoloured
Hardness: 8.5 on Moh`s scale
Refractive Index: 1.744 – 1.755
Specific Gravity: 3.5 – 3.8
Cleavage: Indistinct; 3 directions; rarely seen
Treatments: Chrysoberyl gemstones are not usually treated or enhanced.
Care: Chrysoberyl is durable enough to be cleaned using ultrasonic cleaners or steamers, but care should always be taken.