mineral

Tumbled milky quartz (probable)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Smooth, rounded, opaque-to-translucent white body with dull to waxy luster; likely massive quartz rather than visible crystals. Mohs hardness 7, no cleavage, conchoidal fracture, specific gravity about 2.65.

Identified September 14, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids fill fractures or cavities, commonly in hydrothermal veins and weathered gravel deposits. Quartz is geologically widespread and may range from Precambrian to recent; this piece appears human-shaped or naturally water-rounded.

Uses & applications

Used as an ornamental or lapidary stone, tumbled stone, aggregate, glass raw material, and source mineral for silica. This specimen has modest commercial value.

Geological facts

The cloudy appearance comes from microscopic fluid inclusions, fractures, or fine mineral impurities. It can scratch ordinary steel or glass, unlike calcite or gypsum.

Field identification & locations

Test cautiously on an inconspicuous spot: it should resist a steel knife and scratch glass; vinegar should not fizz. Quartz-bearing gravel is plausible near Trinidad’s varied volcanic, metamorphic, and sedimentary terrains, but a photograph cannot exclude white calcite or porcelain-like material.