Red Jasper
Quartz var. Jasper (Microcrystalline silica) · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal/Hexagonal; typically occurs in a massive, microcrystalline (cryptocrystalline) habit without visible external crystal facets.
Mineral Group
Silicates (Tectosilicate group)
Chemical Formula
SiO2 (Silicon Dioxide) with Fe2O3 (Iron Oxide) inclusions
Formation Process
Primarily sedimentary or hydrothermal; forms as silica-rich fluids permeate porous rocks or volcanic ash, precipitating and consolidating over time. The red color is due to iron inclusions during formation.
About This Crystal
An opaque, microcrystalline variety of quartz characterized by a deep brick-red to brownish-red color. It features a dull to waxy luster when unpolished and a vitreous luster when wet or polished. The texture is dense and fine-grained, often containing internal streaks or mottling.
Physical Characteristics
Color: Brick red; Streak: White; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.58–2.91; Tenacity: Brittle but very tough due to aggregate structure; Fluorescence: Usually inert/none.
Optical Properties
Refractive Index: Approx. 1.54; Birefringence: None (aggregate); Pleochroism: None; Dispersion: None; Optical character: Opaque.
Hardness & Durability
Origin Region
Globally distributed; notable sources include India, Brazil, South Africa, Australia, and the United States (western states). Found in sedimentary or metamorphic environments.
Hardness & Durability
Mohs Hardness: 6.5–7; Toughness: Excellent (high resistance to chipping/breaking); Stability: Very stable, resistant to most household chemicals and light.
Care & Maintenance
Safe to clean with warm soapy water and soft brushes. Generally safe for ultrasonic cleaners. Avoid prolonged exposure to harsh acids. Store away from harder gemstones like Sapphire or Diamond to prevent scratching.
Rarity & Value
Common; value is generally low to moderate. Value is determined by patterns, intensity of red color, and lack of fractures. Often mass-produced for tumbled stones and cabochons.
Special Characteristics
Opaque nature distinguishes it from Carnelian (translucent). Darker 'poppy' or 'brecciated' patterns may occur when mixed with other minerals like Hematite or Magnetite.
Lore & History
Historically used in ancient Egypt for amulets and in Medieval Europe as a 'warrior's stone' for protection. Traditionally associated with the Root Chakra, it is believed in folklore to promote grounding, stamina, and physical strength.