Cave Stalactite and Stalagmite Formation
Calcium Carbonate var. Speleothem · Mineral Specimen
Crystal System
Trigonal
Mineral Group
Carbonates
Chemical Formula
CaCO3
Formation Process
Sedimentary chemical precipitation from water in caves
About This Crystal
Massive cavern formation consisting of earthy brown and tan mineral deposits forming speleothems with a dull to earthy luster.
Physical Characteristics
Brown to tan body color, white streak, hardness of 3, specific gravity 2.71, opaque transparency.
Optical Properties
Uniaxial negative with strong birefringence.
Hardness & Durability
Origin Region
Global limestone cave systems
Hardness & Durability
Mohs hardness of 3, soft and fragile, unsuitable for jewelry wear.
Care & Maintenance
Keep dry, avoid acidic substances and physical impact.
Rarity & Value
Common globally, protected in natural cave environments.
Special Characteristics
Can exhibit fluorescence under ultraviolet light due to organic impurities.
Lore & History
Associated with grounding, deep earth energy, and the passage of time in traditional lore.