Green Calcite
Calcite · Mineral Specimen
Crystal System
Trigonal, massive rhombohedral habit
Mineral Group
Carbonates
Chemical Formula
CaCO3
Formation Process
Sedimentary precipitation and hydrothermal vein formation in low-temperature environments
About This Crystal
A translucent to opaque pale green mineral specimen with a vitreous to resinous luster, showing typical rhombohedral cleavage steps and a massive, blocky habit.
Physical Characteristics
Color is pale mint green; white streak; perfect rhombohedral cleavage in three directions; conchoidal to uneven fracture; specific gravity around 2.71; brittle tenacity; strong effervescence in dilute hydrochloric acid
Optical Properties
Uniaxial negative with strong birefringence and double refraction
Hardness & Durability
Origin Region
Mexico, Madagascar, Brazil; forms in sedimentary, metamorphic, and hydrothermal environments
Hardness & Durability
Mohs hardness of 3; low toughness due to perfect cleavage; sensitive to acids and scratching, poor wearability for rings
Care & Maintenance
Clean with mild soap and warm water only; avoid all acids, harsh chemicals, ultrasonic cleaners, and prolonged exposure to direct sunlight
Rarity & Value
Common; affordable mineral specimen widely available for collectors and decorative purposes
Special Characteristics
Often exhibits strong white or pinkish fluorescence under shortwave and longwave ultraviolet light
Lore & History
Associated with the heart chakra in crystal healing traditions, believed to promote emotional balance, renewal, and release of stagnant energy, though these are metaphysical beliefs rather than scientific claims