mineral

Clear Quartz / Diamond (untested)

Silicon Dioxide (SiO2) or Carbon (C)

AI-generated identification · may be incorrect

Hardness: 7 (Quartz) to 10 (Diamond); Color: Colorless and transparent; Luster: Vitreous to adamantine; Crystal system: Trigonal (Quartz) or Isometric (Diamond); Cleavage: None in Quartz, Octahedral in Diamond

Hardness: 7 (Quartz) to 10 (Diamond)
Color: Colorless and transparent
Luster: Vitreous to adamantine

Identified July 22, 2026More mineral →

Explore Clear Quartz / Diamond (untested) in the encyclopedia →

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Physical properties

Formation & geological history

Formed in hydrothermal veins, pegmatites, and metamorphic rocks (if Quartz), or deep in the Earth's mantle under high pressure and temperature (if Diamond).

Uses & applications

Used extensively in electronics, optics, jewelry, gemstone collections, and industrial abrasives.

Geological facts

Clear quartz crystals are known as 'rock crystal' and were historically believed to be permanently frozen ice. Diamonds are the hardest naturally occurring material on Earth.

Field identification & locations

Field identification can be tested using hardness scratch tests, specific gravity measurements, or thermal conductivity detectors. Found in alluvial gravels, pegmatites, and kimberlites worldwide.