mineral
Small rounded mineral pebble, possibly quartz
Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining
AI-generated identification · may be incorrectPale gray-white with a faint bluish tint, rounded surface, and dull to weakly vitreous luster; apparent grain size is too small for reliable crystal identification. Quartz hardness is Mohs 7, lacks cleavage, and has hexagonal crystal structure; specific gravity is about 2.65.
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Physical properties
Pale gray-white with a faint bluish tint, rounded surface, and dull to weakly vitreous luster; apparent grain size is too small for reliable crystal identification. Quartz hardness is Mohs 7, lacks cleavage, and has hexagonal crystal structure; specific gravity is about 2.65.
Formation & geological history
Likely a naturally weathered fragment of quartz or quartz-rich rock, formed in an igneous or hydrothermal setting and later rounded by transport. Its geological age cannot be determined from the photograph.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces may be collected but this specimen has no evident gemstone grade.
Geological facts
The image alone cannot distinguish quartz from pale feldspar, calcite, or a small concrete/man-made fragment; a scratch test and close examination are needed.
Field identification & locations
Test whether it scratches glass and does not scratch with a steel knife; quartz typically shows no cleavage and a white streak. Common worldwide, especially in stream gravels and quartz veins.
