Tiger"s Eye
, a popular yet inexpensive gemstone, is a pseudomorph of compact Quartz after the fibrous mineral Crocidolite. It is formed when the Quartz takes over and dissolves the Crocodolite, leaving the Quartz in a finely fibrous and chatoyant form. When polished, it"s silky luster creates a beautiful chatoyant effect of moving layers of brown and yellow lines and waves.
| Chemical Formula | SiO2 |
| Color | Yellow, Brown, Multicolored |
| Hardness | 7 |
| Crystal System | Hexagonal |
| Refractive Index | 1.54Â -Â 1.55 |
| SG | 2.63Â -Â 2.65 |
| Transparency | Opaque |
| Double Refraction | None |
| Luster | Silky |
| Cleavage | Indiscernible |
| Mineral Class | Quartz (Chalcedony) |
, a popular yet inexpensive gemstone, is a pseudomorph of compact Quartz after the fibrous mineral Crocidolite. It is formed when the Quartz takes over and dissolves the Crocodolite, leaving the Quartz in a finely fibrous and chatoyant form. When polished, it"s silky luster creates a beautiful chatoyant effect of moving layers of brown and yellow lines and waves. 
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