Yellow Calcite
Calcite · Mineral Specimen and Decorative Stone
Crystal System
Trigonal, typically displaying scalenohedral or rhombohedral crystal habits, often carved or tumbled into smooth decorative forms.
Mineral Group
Carbonates (specifically an anhydrous carbonate)
Chemical Formula
CaCO3
Formation Process
Primarily sedimentary and hydrothermal, precipitating from calcium-rich water solutions under varying temperature and pressure conditions.
About This Crystal
A smooth, polished specimen exhibiting warm yellow to honey-orange coloration with white zoning and translucent to opaque light transmission, carved into a flame or freeform shape.
Physical Characteristics
Yellow body color with a white streak, perfect rhombohedral cleavage in three directions, uneven to conchoidal fracture, specific gravity around 2.71, and brittle tenacity. Often exhibits strong pink or orange fluorescence under shortwave UV light.
Optical Properties
Uniaxial negative with very high birefringence, leading to strong double refraction easily visible through transparent cleavage fragments.
Hardness & Durability
Origin Region
Found globally with major deposits in Mexico, Brazil, the USA, and Madagascar; forms in sedimentary, metamorphic, and hydrothermal environments.
Hardness & Durability
Mohs hardness of 3, making it quite soft and easily scratched by a copper penny or steel knife. Low durability for rings or bracelets, better suited for pendants or display.
Care & Maintenance
Clean with mild soap and warm water only. Avoid ultrasonic cleaners, steam cleaning, and acidic chemicals like vinegar or lemon juice which will etch the calcium carbonate surface. Store away from harder minerals to prevent scratching.
Rarity & Value
Common and widely available. Value depends on size, color saturation, and craftsmanship of the carving, generally ranging from inexpensive to moderate for large decorative pieces.
Special Characteristics
Strong birefringence and prominent fluorescence under ultraviolet light are key distinguishing features of this mineral.
Lore & History
Historically used as an ornamental and architectural stone. In modern crystal healing, yellow calcite is traditionally associated with the solar plexus chakra, believed to enhance motivation, confidence, and positive energy, though these remain traditional beliefs rather than scientific claims.