mineral

Tumbled cream-colored stone, likely milky quartz

Quartz (SiO₂), probably massive/milky quartz

AI-generated identification · may be incorrect

Hardness 7 Mohs; opaque to slightly translucent cream-white color, vitreous-to-waxy luster, conchoidal fracture, no cleavage, trigonal crystal structure, specific gravity about 2.65. The rounded shape indicates tumbling or natural abrasion.

Identified September 6, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous, metamorphic, and hydrothermal fluids; milky appearance results from microscopic fluid inclusions or fractures. Quartz is geologically widespread from Precambrian rocks to modern sediments, but this specimen’s exact age is indeterminate.

Uses & applications

Used as a low-cost lapidary and decorative stone, ornamental aggregate, and silica source; generally not suitable for jewelry unless unusually clear or attractive.

Geological facts

Quartz is one of Earth’s most abundant minerals and is substantially harder than glass, steel, and ordinary household objects. Cream coloration may also reflect surface staining or a pale quartz-rich rock.

Field identification & locations

Identify with a streakless white powder, glass-scratching hardness, and lack of cleavage; a steel blade should not scratch it. Common sources include pegmatites, quartz veins, metamorphic rocks, and river gravels.