mineral

Fire Quartz (Hematoid Quartz)

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Hardness: 7 on Mohs scale; Color: Clear to white quartz with red, orange, or brown veining; Luster: Vitreous; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Clear to white quartz with red, orange, or brown veining
Luster: Vitreous

Identified June 23, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions where iron oxide (Hematite or Limonite) was present during or after the quartz growth, filling internal fractures.

Uses & applications

Primarily used for decorative carvings, lapidary work, jewelry, and by collectors of metaphysical crystals for its aesthetic appearance.

Geological facts

Also known as 'Harlequin Quartz' or 'Ferruginous Quartz', the reddish color is not a dye but a natural inclusion of iron inside the quartz matrix.

Field identification & locations

Identify by its ability to scratch glass and the presence of distinct red-orange internal 'flames' or veins. Commonly found in Madagascar, Brazil, and the USA.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral