gemstone
Fire Opal
Hydrated amorphous silica (SiO2·nH2O)
AI-generated identification · may be incorrectMohs hardness 5.5-6.5, vibrant orange-red to yellow color, subconchoidal fracture, vitreous to greasy luster, amorphous crystal structure.
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Physical properties
Mohs hardness 5.5-6.5, vibrant orange-red to yellow color, subconchoidal fracture, vitreous to greasy luster, amorphous crystal structure.
Formation & geological history
Formed from silica-rich solutions filling volcanic cavities or sedimentary fissures, predominantly found in Mexico and Ethiopia.
Uses & applications
Extensively used in high-end fine jewelry, rings, and pendants due to its brilliant translucent body color.
Geological facts
Unlike precious opals, fire opals are typically valued for their intense body color rather than a strong play-of-color.
Field identification & locations
Easily identified by its distinct warm translucent coloration and conchoidal fracture; sourced majorly from volcanic regions.
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