mineral
Likely quartz-bearing rock or mineral fragment
Probable quartz (SiO₂), possibly a weathered pegmatite or chalcedony fragment
AI-generated identification · may be incorrectWhitish-gray, granular to slightly translucent material with a dull-to-glassy luster; quartz hardness is about 7 Mohs, has no cleavage, and forms a trigonal crystal structure. The visible blue-gray coating may be staining, included minerals, or surface weathering.
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Physical properties
Whitish-gray, granular to slightly translucent material with a dull-to-glassy luster; quartz hardness is about 7 Mohs, has no cleavage, and forms a trigonal crystal structure. The visible blue-gray coating may be staining, included minerals, or surface weathering.
Formation & geological history
Most likely formed in an igneous or hydrothermal setting as quartz veins or pegmatite, later broken and weathered; its geological age cannot be determined from the image.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and ornamental specimens; this small, rough fragment has little practical or jewelry value.
Geological facts
Quartz commonly shows conchoidal fracture rather than cleavage and can scratch ordinary glass. Image quality and the specimen’s small size prevent confident identification of the blue-gray material.
Field identification & locations
Look for glass-scratching hardness, lack of cleavage, and translucent edges; common sources include quartz veins, granitic pegmatites, stream gravels, and mineral-collecting sites worldwide.
