Zebra Jasper
Quartz var. Jasper · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal; microcrystalline/cryptocrystalline aggregate, typically found in massive habits
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2 (Silicon Dioxide) with impurities of Calcium Carbonate (CaCO3) or Clay minerals
Formation Process
Sedimentary or Hydrothermal; forms through the deposition of silica in cracks of existing rocks or through the consolidation of volcanic ash and clay.
About This Crystal
Opaque, fine-grained microcrystalline quartz with a vitreous to waxy luster. Features a dark brown to black primary background with high-contrast, linear white or cream-colored streaks and banding.
Physical Characteristics
Color: Black/Dark Brown with white streaks; Streak: White; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.58-2.91; Fluorescence: Typically none.
Optical Properties
Refractive Index: 1.544-1.553; Birefringence: 0.009 (usually not measurable in aggregate form); Pleochroism: None; Optical Character: Aggregates of uniaxial positive crystals.
Hardness & Durability
Origin Region
Primarily Kunnanurra in Western Australia; also found in Brazil, India, and Africa.
Hardness & Durability
Mohs Hardness: 6.5 to 7.0; Toughness: High due to microcrystalline structure; Stability: Generally stable against chemicals and light.
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals like hydrofluoric acid; store separately from harder gems like Topaz or Sapphire to prevent scratching.
Rarity & Value
Common; generally affordable and valued for its aesthetic patterns. Price range is typically $1-$10 for tumbled stones. No common treatments.
Special Characteristics
Features a unique 'zebra-like' striped pattern caused by the rhythmic deposition of minerals or the fracturing and subsequent filling of the host rock with secondary minerals.
Lore & History
Historically used as a luck and protection stone. In modern metaphysical beliefs, it is associated with the Root Chakra and is thought to provide balance between dualities (yin/yang) and boost physical endurance.