mineral
Green-and-gold apatite-bearing rock, possibly epidote skarn
Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F), with probable epidote and quartz; exact identification requires testing
AI-generated identification · may be incorrectGlassy to resinous luster, translucent pale green to honey-yellow and brown zones, granular/irregular crystal texture, and no obvious cleavage. Apatite hardness is Mohs 5; epidote is 6–7, with specific gravity roughly 3.1–3.5.
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Physical properties
Glassy to resinous luster, translucent pale green to honey-yellow and brown zones, granular/irregular crystal texture, and no obvious cleavage. Apatite hardness is Mohs 5; epidote is 6–7, with specific gravity roughly 3.1–3.5.
Formation & geological history
Likely a hydrothermal or contact-metamorphic skarn or mineralized vein formed when hot fluids altered carbonate or igneous host rock, generally during a regional intrusive event rather than at a precisely determinable age.
Uses & applications
Apatite is used mainly for phosphate fertilizer and occasionally as a gemstone; epidote and mixed specimens are chiefly collector material, while skarn itself has limited construction value.
Geological facts
The vivid green color may reflect epidote, chlorite, or chromium-bearing minerals rather than apatite alone; visible color is insufficient for a confident species identification.
Field identification & locations
Commonly found near granitic intrusions and metamorphosed limestone, including localities in Mexico, Pakistan, Brazil, Norway, and the United States. Check streak, hardness, cleavage, crystal form, and use a gemological or mineralogical test for confirmation.
