mineralogical
Tiger's Eye (with Hematite/Jasper)
SiO2 (Silicon Dioxide) with Fe2O3 (Hematite)
Hardness: 6.5-7 (Mohs); Color: Golden yellow, brown, and red with metallic grey bands; Luster: Silky to metallic; Crystal structure: Trigonal/Fibrous; Specific gravity: 2.64-2.71.
- Hardness
- 6
- Color
- Golden yellow, brown, and red with metallic grey bands
- Luster
- Silky to metallic
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Physical properties
Hardness: 6.5-7 (Mohs); Color: Golden yellow, brown, and red with metallic grey bands; Luster: Silky to metallic; Crystal structure: Trigonal/Fibrous; Specific gravity: 2.64-2.71.
Formation & geological history
Tiger's eye forms when the mineral crocidolite is replaced by silica. The bands in this specimen suggest a tiger iron variety, which includes layers of Jasper and Hematite formed in banded iron formations billions of years ago.
Uses & applications
Primarily used in jewelry (beads, cabochons), ornamental carvings, and collector towers for metaphysical practices.
Geological facts
This specific specimen is a polished 'tower' or 'point.' It exhibits chatoyancy, the optical effect where a band of light reflects off the fibrous inclusions within the stone.
Field identification & locations
Identify by rotating under light to see the characteristic 'cat's eye' shimmer. Commonly found in South Africa, Western Australia, USA, and Brazil. Collectors should look for vibrant colors and distinct banding.
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