metamorphic
Quartz-bearing metamorphic rock, possibly epidote/quartzite
Quartz-rich rock with possible epidote and feldspar; exact identification requires testing
AI-generated identification · may be incorrectHardness approximately 6–7 Mohs; pale gray to lavender exterior with yellow-green crystalline areas, vitreous to dull luster, and massive, nonfoliated texture. Visible grains suggest quartz plus yellow-green epidote or altered feldspar.
Identified More metamorphic →
Explore Quartz-bearing metamorphic rock, possibly epidote/quartzite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness approximately 6–7 Mohs; pale gray to lavender exterior with yellow-green crystalline areas, vitreous to dull luster, and massive, nonfoliated texture. Visible grains suggest quartz plus yellow-green epidote or altered feldspar.
Formation & geological history
Likely formed when silica-rich rock underwent metamorphism and hydrothermal alteration, probably during an older orogenic event; its precise geological age cannot be determined from the image.
Uses & applications
Primarily a collector or ornamental specimen; quartz-rich material may be used as aggregate or decorative stone, but this small piece has no significant industrial value.
Geological facts
The lavender-gray color may reflect quartz, feldspar, or surface staining, while the yellow-green portion is visually consistent with epidote, a common alteration mineral.
Field identification & locations
Look for glassy quartz grains, hardness sufficient to scratch ordinary glass, and yellow-green epidote crystals; streak, acid reaction, magnetism, and a fresh surface would improve identification. Common in metamorphic belts and hydrothermal veins.
More like this
