Stone
Chrysoberyl
Chrysoberyl is a oxide mineral with composition BeAl₂O₄, orthorhombic symmetry and Mohs hardness about 8.5.
Also known as: chrysoberyl · krisoberil · krizoberil
Mineral identity
Chrysoberyl is a oxide mineral or mineral group with the composition BeAl₂O₄. It crystallizes in the orthorhombic system and has a Mohs hardness of about 8.5. Its typical colour range is yellow-green to brown; reliable identification depends on structure and physical properties, with laboratory analysis where needed, rather than colour alone.
Formation and occurrence
Its geological setting, associated minerals and host rock must be read together when assessing identity and origin. A locality name by itself is not a guarantee of quality, treatment status or natural origin. Representative occurrences and historically important sources are documented in the corresponding Turkish section.
Gemology, history and use
Chrysoberyl has a documented role as a mineral specimen, gem, ore or cultural material according to its durability and chemistry. Natural, synthetic, treated and look-alike materials must be distinguished; a trade name alone does not establish mineral identity. Collectors consider crystal integrity and documented provenance, while jewellery use also requires attention to cleavage, toughness, heat and chemical sensitivity.
Distinguishing features
The formula BeAl₂O₄, orthorhombic symmetry, hardness near 8.5, and characteristic occurrence form a combined identification framework. Colour can change with impurities, inclusions, alteration or surface tarnish and is therefore not conclusive by itself. Valuable, ambiguous or treated material should be examined by a qualified gemologist or mineralogist.
Symbolism and traditional context
Modern and historical traditions give Chrysoberyl symbolic meanings comparable to those described in the Turkish entry. These are cultural or esoteric associations, not measured mineral effects or medical treatment claims. Symbolic practice must never override chemical safety or physical durability.
Care and safety
Care must reflect hardness, cleavage, solubility and chemistry. Chrysoberyl should be protected from unsuitable cleaning, impact and uncontrolled dust. The specific warning for this entry is: Genel kullanımda düşük risklidir; kesme tozu solunmamalıdır. Unknown specimens should not be ingested or placed in drinking water, and must be kept away from children and pets. Mineral use does not replace professional medical diagnosis or treatment.
Source approach
Identity, formula and locality were checked against Mindat; gemological context against GIA; and collection context against Smithsonian Mineral Sciences.
Properties
- Mohs hardness
- 8.5
- Primary color
- yellow-green to brown
- Mineral family
- oxide
- Scientific name
- chrysoberyl