metamorphic
Serpentinite with quartz-carbonate veins
Serpentinite, chiefly serpentine-group minerals (e.g., lizardite, antigorite, chrysotile), cut by quartz and carbonate veins
AI-generated identification · may be incorrectGreen to brown, mottled and veined, with a dull to waxy luster; serpentine hardness is about 2.5–5.5 Mohs. The image does not show crystal structure or cleavage clearly; density and exact mineral proportions cannot be determined visually.
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Physical properties
Green to brown, mottled and veined, with a dull to waxy luster; serpentine hardness is about 2.5–5.5 Mohs. The image does not show crystal structure or cleavage clearly; density and exact mineral proportions cannot be determined visually.
Formation & geological history
Forms when water alters ultramafic rocks, commonly at low temperatures near tectonic plate boundaries; veins fill later fractures. Its age depends on the source rock and cannot be inferred from the photograph.
Uses & applications
Polished serpentinite is used as ornamental stone, carvings, and sometimes building or decorative material; asbestos-bearing varieties require careful testing and handling.
Geological facts
The contrasting pale veins likely consist of quartz, carbonate, or both; appearance alone cannot confirm their identity.
Field identification & locations
Look for a green, often waxy or slick surface and irregular pale veining; serpentinite occurs in many ophiolite and mountain-belt regions. Identification and asbestos risk require examination or testing.
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