mineral

Rough Diamond / Clear Quartz

C (Carbon) or SiO2 (Silicon Dioxide)

Hardness: 7 (Quartz) to 10 (Diamond); Color: Colorless to translucent white; Luster: Vitreous to adamantine; Crystal structure: Trigonal (Quartz) or Isometric (Diamond); Cleavage: None (Quartz) or Octahedral (Diamond); Specific Gravity: 2.65 (Quartz) or 3.52 (Diamond)

Hardness: 7 (Quartz) to 10 (Diamond)
Color: Colorless to translucent white
Luster: Vitreous to adamantine

Identified July 22, 2026More mineral →

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Physical properties

Formation & geological history

Rough clear crystals typically form either deep in Earth's mantle under extreme pressure and temperature (Diamond) or in pegmatites and hydrothermal veins during cooling of silica-rich fluids (Quartz).

Uses & applications

Used in high-end jewelry, industrial cutting/abrasives (if diamond), gemstones, quartz watches, and decorative mineral collections.

Geological facts

Rough alluvial diamonds or quartz pebbles are often found in river gravels and mining pits, showing rounded or semi-faceted natural crystal shapes before polishing.

Field identification & locations

Identify in the field by checking hardness (scratch testing with steel or glass) and specific density. Commonly found in gem gravels worldwide, including parts of Africa, Brazil, and India.

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