Zebra Jasper
Quartz var. Jasper (Microcrystalline Quartz) · Decorative Stone / Semi-Precious Gemstone
Crystal System
Trigonal (Microcrystalline / Cryptocrystalline aggregate)
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2
Formation Process
Sedimentary or hydrothermal precipitation of silica-rich fluids filling cracks and cavities, often involving colloidal silica deposition that hardens into microcrystalline quartz with various mineral impurities.
About This Crystal
The specimen is shaped into a polished top-drilled hexagonal crystal point pendant featuring a distinct banded pattern of opaque grayish-white and dark charcoal to black stripes and swirls. It has a smooth, polished surface with a waxy to vitreous luster characteristic of tumbled and carved microcrystalline quartz.
Physical Characteristics
Color: Greyscale pattern of white, gray, and black. Streak: White. Cleavage: None. Fracture: Conchoidal to uneven. Specific Gravity: 2.65. Tenacity: Brittle. Fluorescence: Typically inert, though some jasper varieties show weak greenish fluorescence under shortwave UV due to organic or mineral impurities.
Optical Properties
Refractive Index: 1.544 - 1.553. Birefringence: 0.009 (Weak). Pleochroism: None (isotropic appearance due to microcrystalline aggregate structure). Singly or doubly refractive: Aggregates show aggregate birefringence.
Hardness & Durability
Origin Region
India, Africa, Australia, and the United States; forms in sedimentary and volcanic environments
Hardness & Durability
Mohs Hardness: 6.5 to 7. Toughness: Good, durable for daily jewelry wear due to the microcrystalline interlocking structure, making it less prone to cleavage than macrocrystalline quartz.
Care & Maintenance
Clean with warm soapy water and a soft brush. Avoid harsh chemical cleaners and prolonged exposure to direct, intense sunlight to prevent any potential fading of dyed varieties, though natural zebra jasper is relatively stable.
Rarity & Value
Common. Widely available and affordable, typically sold as polished tumbled stones, beads, and carved pendants. Value depends primarily on the aesthetic appeal of the banding pattern and symmetry of the carving.
Special Characteristics
Notable for its striking natural contrasting zebra-like black and white bands and swirls, created by inclusions of other minerals like hematite, magnetite, or organic matter during the silica precipitation process.
Lore & History
Often utilized in modern crystal healing as a stone of balance, endurance, and grounding, traditionally associated with the Root Chakra. While valued in metaphysical practices for promoting optimism and stamina, these are traditional cultural beliefs rather than scientifically verified properties.