mineral

Fire Quartz (Hematoid Quartz)

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Hardness: 7 (Mohs scale); Color: Clear with red, orange, or brown streaks; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Hardness: 7 (Mohs scale)
Color: Clear with red, orange, or brown streaks
Luster: Vitreous

Identified April 4, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Clear with red, orange, or brown streaks; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal fluids or pegmatites where iron oxide (hematite or limonite) is present as an inclusion or coating within the quartz structure.

Uses & applications

Primarily used in jewelry making (beads, cabochons), metaphysical practices, and as a decorative collector specimen.

Geological facts

Also known as 'Harlequin Quartz,' the red inclusions are actually tiny crystals of Hematite or Lepidocrocite trapped inside the quartz during its growth period.

Field identification & locations

Identify by its characteristic 7-Mohs hardness (scratches glass) and the presence of internal red 'wisps' or 'clouds' that do not rub off. Commonly found in Madagascar and Brazil.

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