mineral

Tumbled or broken translucent quartz-like fragment

Quartz (silicon dioxide, SiO₂), possibly chalcedony or calcite

AI-generated identification · may be incorrect

Pale cream to translucent, with a glassy-to-waxy luster and irregular conchoidal-looking fracture; apparent hardness is roughly 3–7 Mohs, but an image cannot distinguish quartz from calcite reliably. No visible crystal faces or cleavage are evident.

Identified September 20, 2026More mineral →

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Physical properties

Formation & geological history

Likely a natural mineral fragment or processed stone chip formed in a silica-rich vein, sediment, or cavity; its geological age cannot be determined visually. The creamy coloration may come from inclusions, weathering, or surface coating.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and decorative stone; attractive translucent pieces may be used in jewelry or sold as specimens.

Geological facts

Quartz typically scratches glass and shows no cleavage, whereas calcite is softer, cleaves readily, and fizzes in dilute hydrochloric acid. The image alone does not support a precise species identification.

Field identification & locations

Test inconspicuously: quartz should scratch glass and resist a steel knife; calcite is usually scratched by a knife and effervesces in acid. Common sources include hydrothermal veins, geodes, and weathered granitic or metamorphic rocks.