mineral
Red Quartz (Tumbled)
Silicon Dioxide with Iron Oxide inclusions (SiO2)
Hardness: 7 (Mohs scale), Color: Translucent to opaque red, Luster: Vitreous/glassy, Crystal structure: Trigonal/Hexagonal, Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Translucent to opaque red, Luster: Vitreous/glassy, Crystal structure: Trigonal/Hexagonal, Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or igneous environments where silica-rich fluids crystallize. The red color is typically caused by hematite or goethite inclusions trapped during growth.
Uses & applications
Used primarily in jewelry (beads, cabochons), metaphysical healing practices, home decor, and as pocket stones for collectors.
Geological facts
Red quartz is often called Hematoid Quartz or Fire Quartz. While it looks like a ruby, its crystal structure and hardness are distinctly different.
Field identification & locations
Identify by its hardness (scratches glass) and lack of bubbles (unlike red glass). Naturally found in Brazil, Madagascar, and the United States.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock