Red Jasper
Microcrystalline Quartz var. Jasper · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal/Hexagonal system with microcrystalline or cryptocrystalline habit (massive)
Mineral Group
Silicates; Tectosilicate (Quartz group)
Chemical Formula
SiO2 with Fe2O3 (Hematite) inclusions
Formation Process
Forms through the infiltration of silica-rich fluids into volcanic ash or fine-grained sediments (Sedimentary/Hydrothermal), with hematite providing the red pigment during consolidation.
About This Crystal
An opaque, microcrystalline variety of quartz. It features a deep brick-red to terracotta color with a smooth, vitreous to waxy luster when polished. It often contains dark streaks or patches of other minerals like hematite or goethite.
Physical Characteristics
Color: Red; Streak: White; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.58-2.91; Tenacity: Brittle; Fluorescence: Generally inert.
Optical Properties
Refractive Index: Approx. 1.54; Birefringence: None (opaque); Pleochroism: None; Luster: Vitreous to waxy; Diaphaneity: Opaque.
Hardness & Durability
Origin Region
Found globally; notable sources include India, Brazil, USA (Oregon, Idaho), Madagascar, and Russia. Often found in sedimentary or volcanic environments.
Hardness & Durability
Mohs Hardness: 6.5 to 7; Toughness: Excellent (due to microcrystalline structure); Stable and highly wearable for jewelry.
Care & Maintenance
Clean with warm soapy water and a soft cloth; safe for ultrasonic cleaning but steam cleaning should be used with caution; avoid harsh chemicals and store separately from harder gems like Topaz.
Rarity & Value
Common and readily available; value is determined by color intensity and interesting patterns; generally inexpensive and rarely treated, though occasionally dyed.
Special Characteristics
Features distinct opacity and hematite-driven coloration; can show 'brecciated' patterns if broken and healed by clearer silica.
Lore & History
Historically known as a stone of endurance and protection, used by Ancient Egyptians in amulets and by Native Americans as a 'blood of Mother Earth' stone. In modern metaphysical practices, it is associated with the Root Chakra and grounding energy.