Chrysoberyl is an aluminate of beryllium with the formula BeAl2O4, both a mineral and a gemstone, and its name comes from the Greek words for gold and beryl, meaning a gold-white spar. Despite the similar names, chrysoberyl and beryl are two completely different gemstones, although both contain beryllium, aluminium and oxygen. It lies at 8.5 on the Mohs scale, the third-hardest frequently encountered natural gemstone, between corundum and topaz, and its crystals often form cyclic twins called trillings. In this atlas it is the mineral species that gemstones recorded as chrysoberyl record.
Facts
Classification
Crystal System Classification Chemical Formula Hardness (Mohs) Connections
Classified As
Entity-backed identity for the material classification this material already carries as an enum fact, pointing at the class subcategory of the same name. The enum fact itself stays on the entity unchanged.
Crystallizes In System
Entity-backed identity for the crystal system this mineral already carries as an enum fact, phase 3 bucket conversion (docs\design_entity_backed_browse_buckets_20260928.md, w-bucketconv-divmore2-0929). The original fact stays on the entry unchanged.
In Discipline
In the Other Atlases
Sources
1. Chrysoberyl (Wikipedia)
Wikimedia FoundationChrysoberyl, lead paragraph
The mineral or gemstone chrysoberyl is an aluminate of beryllium
Chrysoberyl, article text
Chrysoberyl is the third-hardest frequently encountered natural gemstone and lies at 8.5 on the Mohs scale of mineral hardness, between corundum (9) and topaz (8).
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