metamorphic
Polished ruby-in-fuchsite (tentative)
Fuchsite mica with corundum (ruby), commonly in quartzite or mica schist
AI-generated identification · may be incorrectGreen to yellow-green, purple-red patches, pearly to vitreous luster, and massive/granular texture; fuchsite has Mohs hardness 2–3, while ruby is 9. Cleavage is prominent in mica but not obvious in this polished piece; density is commonly about 2.7–3.0.
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Physical properties
Green to yellow-green, purple-red patches, pearly to vitreous luster, and massive/granular texture; fuchsite has Mohs hardness 2–3, while ruby is 9. Cleavage is prominent in mica but not obvious in this polished piece; density is commonly about 2.7–3.0.
Formation & geological history
Forms in aluminum-rich metamorphic rocks, where chromium-bearing fluids produce green fuchsite and corundum; typically associated with Precambrian metamorphic terrains. The image alone cannot confirm the mineral assemblage, and it could also be a polished epidote- or jasper-bearing rock.
Uses & applications
Used as a lapidary and ornamental stone for cabochons, carvings, and polished specimens; gem-quality ruby inclusions can increase value, though most material is primarily decorative.
Geological facts
The contrasting green, yellow, and purplish-red pattern is characteristic of mixed mineral aggregates rather than a single crystal. Ruby identification requires hardness, refractive-index, or chemical testing.
Field identification & locations
Commonly sold from India, Brazil, and Africa; look for mica sparkle/cleavage, red corundum grains, and hardness contrast. A streak, loupe examination, UV response, or gemological testing would improve identification.
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