Red Jasper
Quartz var. Jasper · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal; Microcrystalline (Cryptocrystalline) massive habit with no visible crystals
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2 (Silicon Dioxide) with Fe2O3 (Hematite) inclusions
Formation Process
Sedimentary or Hydrothermal; forms when silica-rich fluids permeate porous rocks or volcanic ash, consolidating with iron oxide
About This Crystal
An opaque, microcrystalline variety of quartz. It features a deep brick-red to terracotta color with a dull to vitreous luster and a smooth, blocky surface texture.
Physical Characteristics
Color: Red (due to iron); Streak: White; Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58–2.91; Fluorescence: Typically none
Optical Properties
Refractive Index: 1.54; Birefringence: None (aggregate); Pleochroism: None; Opaque (no light transmission)
Hardness & Durability
Origin Region
Brazil, India, South Africa, and USA; found in large sedimentary and metamorphic deposits
Hardness & Durability
Mohs Hardness: 6.5–7; High toughness; Excellent stability for jewelry and daily wear
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals; safe in most ultrasonic cleaners
Rarity & Value
Common; Very affordable; Value is determined by color intensity and interesting patterns/banding
Special Characteristics
Opaqueness distinguishes it from Carnelian; can sometimes show 'orbicular' patterns or quartz veining
Lore & History
Historically known as the 'Stone of Endurance' and used by ancient warriors for protection; associated with the Root Chakra in modern crystal healing lore