📜 Key facts
| Age | Varies by deposit; Australian and Thai material comes from basalt-hosted sapphire fields |
|---|---|
| Origin & sources | Thailand (Chanthaburi) and Queensland, Australia (Anakie fields, home of the 'Black Star of Queensland'). |
| Composition | Corundum with oriented inclusions (hematite and ilmenite, plus rutile) that create a golden or silvery star |
How it forms
Iron and titanium in the corundum separate into microscopic oriented platelets and needles. Light reflecting from them forms the star on a dark body.
Mineral data: see Sapphire.
🌍 Where it's found
- Type locality
- Notable source / deposit
- Country of origin
Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.
Learn more
Mineral variety
BlueBlack
RootThird Eye
Healing crystal




