Red Jasper (with brecciated features)
Silicon Dioxide var. Jasper · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal/Hexagonal system; typically manifests as a microcrystalline or cryptocrystalline massive habit.
Mineral Group
Silicates (Tectosilicate subgroup; Chalcedony variety)
Chemical Formula
SiO2 (with Fe2O3 iron oxide inclusions providing the red color)
Formation Process
Primarily sedimentary or hydrothermal; forms when silica-rich fluids permeate porous rocks or volcanic ash, or via chemical precipitation in sedimentary environments.
About This Crystal
An opaque, microcrystalline variety of quartz. This specimen displays a deep brick-red to brownish-red body with characteristic white or cream-colored veining/mottling. It features a waxy to dull luster, which takes a vitreous polish, and shows a smooth, tumbled surface with some visible pits and natural fractures.
Physical Characteristics
Color: Red (body), White (veining); Streak: White; Cleavage: None; Fracture: Conchoidal to splintery; Specific Gravity: 2.58–2.91; Fluorescence: Typically inert.
Optical Properties
Refractive Index: 1.544–1.553; Birefringence: None (aggregate effect); Pleochroism: None; Diaphaneity: Opaque.
Hardness & Durability
Origin Region
Found globally; major deposits in South Africa, Brazil, India, USA (Southwest), and Madagascar.
Hardness & Durability
Mohs Hardness: 6.5–7.0. Excellent toughness due to its dense, microcrystalline structure; very durable for jewelry and daily wear.
Care & Maintenance
Clean with warm soapy water and a soft brush. Avoid harsh chemicals like hydrofluoric acid. Generally stable in sunlight and resistant to heat.
Rarity & Value
Common and abundant. Value is determined by patterns, color saturation, and polish quality. Low price range, making it accessible for carvings and cabochons.
Special Characteristics
Displays a 'brecciated' appearance where the original jasper has fractured and been 're-cemented' by clear or white chalcedony/quartz, creating the spider-web pattern.
Lore & History
Historically known as the 'Stone of Endurance' and used by ancient Egyptians in amulets. In traditional lore, it is associated with the Root Chakra, grounding energy, and physical strength.