Zebra Marble
Calcite-Dolomite Marble with Carbonaceous inclusions · Decorative Stone / Semi-Precious Gemstone
Crystal System
Trigonal (Hexagonal scalenohedral), usually occurs in massive, granular, or microcrystalline habits.
Mineral Group
Carbonates (Calcite subgroup)
Chemical Formula
CaCO3 (with Mg and C trace inclusions)
Formation Process
Metamorphic: Formed through the recrystallization of limestone or dolostone under intense heat and pressure, with high-carbon impurities creating 'zebra' stripes.
About This Crystal
An opaque to translucent stone characterized by distinctive alternating bands or patches of creamy white and dark gray to charcoal black. It exhibits a vitreous to waxy luster and a smooth, blocky crystalline structure.
Physical Characteristics
Color: White and Black/Gray; Streak: White; Cleavage: Perfect rhombohedral in individual crystals but obscured in massive form; Fracture: Granular to uneven; Specific Gravity: 2.7-2.9; Fluorescence: Occasionally shows weak white or red under UV.
Optical Properties
Refractive Index: 1.48-1.66; Birefringence: Strong (0.172); Optically Uniaxial negative; generally opaque in thick sections.
Hardness & Durability
Origin Region
Prominently sourced from Mexico, Brazil, and parts of Australia; typically found in regional metamorphic belts.
Hardness & Durability
Mohs Hardness: 3; Toughness: Poor; very soft and brittle; prone to scratching and acid etching. Not ideal for high-wear jewelry.
Care & Maintenance
Avoid all acids (even lemon juice); clean only with warm, soapy water and a soft cloth; store separately to prevent scratches; avoid ultrasonic cleaners.
Rarity & Value
Common; relatively inexpensive due to abundance. Value is based on the contrast of the banding and the quality of the polish.
Special Characteristics
Strong effervescence in contact with cold dilute hydrochloric acid; distinctive high-contrast rhythmic banding (pseudo-layering).
Lore & History
Historically used for architectural ornamentation; in folklore, it is often associated with the balance of opposites (yin-yang) and shielding due to its high-contrast color pattern.