Red Jasper
Quartz var. Jasper · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal/Hexagonal system; Microcrystalline/Cryptocrystalline habit, typically occurring in massive form.
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2 (Silicon Dioxide) with impurities of Fe2O3 (Iron Oxide/Hematite)
Formation Process
Forms through the deposition of silica from water or hydrothermal fluids within volcanic ash or sedimentary rocks. The red color is a result of iron inclusions (hematite) during the silica replacement process.
About This Crystal
An opaque, microcrystalline variety of quartz and chalcedony. It features a deep brick-red to brownish-red color with characteristic white or cream-colored streaks and inclusions. The luster is dull to sub-vitreous when unpolished, becoming waxy to vitreous when tumbled.
Physical Characteristics
Color: Brick red; Streak: White; Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58–2.91; Tenacity: Brittle; Fluorescence: Typically inert under UV light.
Optical Properties
Refractive Index: 1.54–1.55; Birefringence: None (aggregate); Optical Character: Singly refractive aggregate; Diaphaneity: Opaque.
Hardness & Durability
Origin Region
Globally abundant; major sources include South Africa, Brazil, India, USA (Oregon, Idaho), and Madagascar. Found in sedimentary environments and hydrothermal veins.
Hardness & Durability
Mohs Hardness: 6.5–7. Excellent durability and toughness for jewelry as it lacks cleavage and is chemically stable.
Care & Maintenance
Extremely durable. Clean with warm soapy water and a soft brush. Resistant to most household chemicals, but avoid prolonged exposure to harsh acids. Store separately from softer stones like Opal or Fluorite to prevent scratching.
Rarity & Value
Common and widely available. Value is determined by patterns and color intensity rather than rarity. Generally inexpensive, often sold as tumbled stones or cabochons.
Special Characteristics
Displays 'landscape' or 'brecciated' patterns occasionally; the specimen shown exhibits a 'linear' or 'fibrous' visual texture caused by the irregular distribution of silica and iron oxides.
Lore & History
Historically known as the 'Stone of Endurance.' In ancient Egypt, it was associated with the blood of Isis and used in amulets. In traditional crystal healing, it is associated with the Root Chakra and is believed to provide grounding, protective energy, and physical vitality.