Orange Calcite
Calcite (Variety: Orange) · Decorative Stone / Mineral Specimen
Crystal System
Trigonal; typically occurs in massive or coarse-grained habits rather than distinct crystals when used for carvings.
Mineral Group
Carbonates
Chemical Formula
CaCO3
Formation Process
Sedimentary precipitation in marine environments or hydrothermal deposition in limestone cavities at relatively low temperatures.
About This Crystal
A vibrant orange to peach-colored specimen with a waxy, 'soapy' luster. It is translucent to opaque with visible internal cleavage planes and a sugary texture.
Physical Characteristics
Color: Orange/Peach; Streak: White; Cleavage: Perfect rhombohedral in 3 directions; Fracture: Uneven/Conchoidal; SG: 2.71; Fluorescence: Often pink or red under SW UV.
Optical Properties
Refractive Index: 1.486 - 1.658; Birefringence: Extremely high (0.172); Uniaxial negative; no significant pleochroism in massive forms.
Hardness & Durability
Origin Region
Notably Mexico, Brazil, and the USA (Utah/Arizona). Forms in sedimentary environments and hydrothermal veins.
Hardness & Durability
Mohs Hardness: 3; very soft and brittle. Not recommended for high-wear jewelry; easily scratched by steel or quartz.
Care & Maintenance
Avoid acids (vinegar/lemon), ultrasonic cleaners, and steam. Clean with warm soapy water and a soft cloth; store separately to prevent scratches.
Rarity & Value
Common; Value is determined by color saturation and carving craftsmanship. Generally very affordable, ranging from $5-$50 for small carvings.
Special Characteristics
Displays a characteristic 'waxy' or 'greasy' feel; reacts strongly (effervesces) with cold dilute hydrochloric acid.
Lore & History
Historically used for decorative ornaments; traditionally associated with the Sacral Chakra and believed by practitioners to boost creativity and energy.