Star Sapphire
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Physical & Optical Properties
Mohs Hardness
| Mohs | Reference mineral | Star Sapphire |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | ● |
| 10 | Diamond |
Crystal System
Value & Market
Where to Buy Star Sapphire
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About Star Sapphire
Star Sapphire is a corundum displaying a four- or six-rayed asterism caused by silk-like rutile or hematite inclusions intersecting at angles within the gem, producing a ghostly floating star visible under direct light. The Star of India, a 563-carat blue star sapphire from Sri Lanka, is the world's largest gem-quality sapphire and resides at the American Museum of Natural History. Sri Lanka, Myanmar, and Australia produce the most significant star sapphires.
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Jewelry Use
Suitable for daily wear