Red Jasper (Banded/Orbicular variety)
Quartz var. Jasper · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal (Hexagonal system); typically occurs in massive, microcrystalline (cryptocrystalline) habits with no visible individual crystals.
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2 with Fe2O3 (Hematite) inclusions
Formation Process
Sedimentary or Hydrothermal; forms when silica-rich fluids precipitate into cavities or replace organic matter, with iron oxide inclusions providing the red pigmentation.
About This Crystal
An opaque, microcrystalline variety of quartz. It features a deep reddish-orange to brick-red body color with a distinct white or light grey horizontal band or 'stripe.' It has a sub-vitreous to waxy luster and a smooth, tumbled surface.
Physical Characteristics
Color: Brick red with white banding; Streak: White; Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58–2.91; Fluorescence: Usually none; Tenacity: Brittle but tough due to microcrystalline structure.
Optical Properties
Refractive Index: 1.544–1.553; Birefringence: None (aggregate); Pleochroism: None; Diaphaneity: Opaque.
Hardness & Durability
Origin Region
Found globally; major sources include South Africa, Brazil, India, USA (Oregon/Idaho), and Australia.
Hardness & Durability
Mohs Hardness: 6.5–7; Toughness: Excellent; Stability: Very high stability against light and most chemicals; excellent for daily jewelry wear.
Care & Maintenance
Safe to clean with warm soapy water and soft brushes. Generally safe for ultrasonic cleaners. Store separately from softer stones like Calcite or Fluorite to prevent scratching.
Rarity & Value
Common; Value is generally low but increases for specimens with unique, symmetrical patterns or high color saturation. Often sold as tumbled stones or cabochons.
Special Characteristics
Banding or 'riband' patterns caused by rhythmic precipitation of different mineral phases (silica vs. clay/iron oxide), creating the high-contrast stripe visible in this specimen.
Lore & History
Historically used in ancient Egypt for amulets and in medieval Europe as a stone of protection and endurance. In traditional lore, it is associated with the Root Chakra and is believed to provide grounding, physical strength, and stability.