mineral

Iron-stained Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Hardness: 7 (Mohs scale); Color: White or translucent with red/orange veining; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture.

Hardness: 7 (Mohs scale)
Color: White or translucent with red/orange veining
Luster: Vitreous (glassy)

Identified March 14, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: White or translucent with red/orange veining; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture.

Formation & geological history

Formed through hydrothermal processes where silica-rich fluids crystallize in rock fractures. The red coloration is caused by iron oxide (Hematite or Limonite) leaching into the cracks of the quartz after it has formed.

Uses & applications

Used primarily as decorative gravel, in landscaping, as tumbling rough for rock collectors, and occasionally in metaphysical jewelry as 'Fire Quartz' or 'Hematoid Quartz'.

Geological facts

This specific appearance is often referred to in the trade as 'Hematoid Quartz.' It is one of the most common mineral combinations on Earth because quartz and iron are extremely abundant in the crust.

Field identification & locations

Identify in the field by its ability to scratch glass and its non-reactive nature to acid. It is commonly found in riverbeds, glacial till, and mountainous outcrops. Collectors look for pieces with high transparency and vivid red patterns.

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