metamorphic
Tiger's Iron
Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)
Hardness: 7 on Mohs scale; Color: Gold, silver-grey, and dark red/brown bands; Luster: Silky to sub-metallic; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.64-2.71
- Hardness
- 7 on Mohs scale
- Color
- Gold, silver-grey, and dark red/brown bands
- Luster
- Silky to sub-metallic
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Physical properties
Hardness: 7 on Mohs scale; Color: Gold, silver-grey, and dark red/brown bands; Luster: Silky to sub-metallic; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.64-2.71
Formation & geological history
Formed through the compression of Tiger's Eye, Red Jasper, and Hematite into a single rock unit. It primarily occurs in the Brockman Iron Formation of Western Australia, dating back approximately 2.5 billion years (Proterozoic Eon).
Uses & applications
Majorly used for lapidary work including high-end cabochons, jewelry, decorative carvings, and as a popular 'healing crystal' in the metaphysical community.
Geological facts
Unlike pure Tiger's Eye, Tiger's Iron is a combination rock. It is considered a metamorphic rock created from sedimentary Banded Iron Formations (BIFs). The name 'Mugglestone' is common in the UK market for lower-quality tumbled pieces.
Field identification & locations
Identify in the field by looking for distinct layers of golden chatoyancy, metallic hematite, and opaque red jasper. It is found exclusively in highly weathered Proterozoic iron formations, most notably in the Pilbara region of Western Australia.
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