Red Jasper
Quartz var. Jasper (Red) · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal/Hexagonal; microcrystalline (cryptocrystalline) aggregate with no visible external crystal habit, usually massive or granular.
Mineral Group
Silicates (Subclass: Tectosilicates; Quartz Group)
Chemical Formula
SiO2 (Silicon Dioxide) with Fe2O3 (Hematite) inclusions as the primary pigment
Formation Process
Primarily sedimentary or hydrothermal; forms as silica-rich fluids permeate porous rock or volcanic ash, consolidating into a dense, microcrystalline silica with iron inclusions.
About This Crystal
An opaque, microcrystalline variety of quartz. It features a deep brick-red to brownish-red color with a dull to vitreous luster when polished. This specimen exhibits smooth, tumbled surfaces with subtle parallel banding or planar inclusions.
Physical Characteristics
Color: Brick-red; Streak: White to pale red; Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58–2.91; Fluorescence: Generally inert under UV light.
Optical Properties
Refractive Index: Approx. 1.54; Birefringence: None (aggregate); Pleochroism: None; Transparency: Opaque; Luster: Vitreous to waxy (when polished).
Hardness & Durability
Origin Region
Found globally; notable sources include Brazil, South Africa, India, Australia, and the United States (western states), often forming in sedimentary or metamorphic layers.
Hardness & Durability
Mohs Hardness: 6.5–7; Toughness: High due to interlocking microcrystalline structure; Stability: Excellent under normal light and heat conditions.
Care & Maintenance
Clean with warm soapy water and a soft brush. Highly durable and resistant to most household chemicals, but should be stored away from harder minerals like Diamond or Sapphire to prevent scratches.
Rarity & Value
Common; very affordable. Value is determined by color intensity, pattern uniformity, and polish quality. Large specimens are widely available and rarely treated.
Special Characteristics
Opaque nature distinguishes it from Carnelian (translucent). Darker black or grey streaks may be present due to high concentrations of iron or manganese oxides.
Lore & History
Historically used in the breastplates of high priests and as amulets for protection in ancient Egypt and Rome. In metaphysical traditions, it is associated with the Root Chakra and believed to provide 'nurturing' energy and physical grounding.