igneous
Green-speckled igneous rock, likely epidote-bearing basalt or serpentinite
Tentatively epidote-bearing basalt (compositionally uncertain from the image)
AI-generated identification · may be incorrectDark green-gray, fine-grained, dull to slightly vitreous, with pale green mineral spots; likely Mohs 5–7 and no obvious cleavage. The texture suggests interlocking silicate minerals rather than glass.
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Physical properties
Dark green-gray, fine-grained, dull to slightly vitreous, with pale green mineral spots; likely Mohs 5–7 and no obvious cleavage. The texture suggests interlocking silicate minerals rather than glass.
Formation & geological history
Probably formed from mafic magma or altered ultramafic rock; exact age and process cannot be determined photographically. Green coloration may reflect epidote, chlorite, olivine, or serpentine alteration.
Uses & applications
Typically used as a hand specimen, landscaping stone, or aggregate; attractive pieces may be collected but are generally not gemstone grade.
Geological facts
The pale spots could represent epidote or altered feldspar, but lighting and image resolution prevent reliable species identification. A fresh streak, hardness, and close-up texture would help distinguish basalt from serpentinite.
Field identification & locations
Common possibilities occur in volcanic and metamorphic terrains worldwide, including the Pacific Northwest, California, Appalachians, and Mediterranean regions. Test hardness, inspect a fresh surface, and check for waxy luster or fibrous texture if serpentinite is suspected.
