Red Jasper
Quartz var. Red Jasper · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal (Hexagonal), usually occurring in massive or microcrystalline habits with no visible crystal faces.
Mineral Group
Silicates (Tectosilicate)
Chemical Formula
SiO2 (Silicon Dioxide) with Fe2O3 (Hematite) inclusions
Formation Process
Sedimentary or Hydrothermal; forms when silica-rich fluids percolate through rocks, picking up iron oxides and solidifying into a microcrystalline mass.
About This Crystal
An opaque, microcrystalline variety of quartz characterized by a deep brick-red to terracotta color. It has a dull to waxy luster and a smooth, dense texture with occasional veining.
Physical Characteristics
Color: Brick red; Streak: White or reddish-brown; Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58-2.91; Fluorescence: Typically none.
Optical Properties
Refractive Index: Approx. 1.54; Birefringence: None (aggregate); Pleochroism: None; Optical Character: Cryptocrystalline aggregate.
Hardness & Durability
Origin Region
Brazil, India, South Africa, and USA; commonly found in iron-rich sedimentary or volcanic environments.
Hardness & Durability
Mohs Hardness: 6.5 to 7; Toughness: Very high due to microcrystalline structure; Stability: Excellent, resistant to most household chemicals and light.
Care & Maintenance
Safe to clean with warm soapy water or ultrasonic cleaners. Store away from softer stones to prevent scratching them. Avoid harsh acids.
Rarity & Value
Common; very affordable. Value is determined by color intensity, pattern uniformity, and quality of polish for lapidary work.
Special Characteristics
Opaque transparency even on thin edges; high iron content provides the signature red pigmentation; often contains 'webbing' or quartz veins.
Lore & History
Historically used by ancient Egyptians for amulets and North Americans as 'blood of the earth.' Traditionally associated with the Root Chakra and believed to provide grounding and physical strength.