Yellow Calcite
Calcite · Decorative Stone and Mineral Specimen
Crystal System
Trigonal, massive or carved habit
Mineral Group
Carbonates
Chemical Formula
CaCO3
Formation Process
Sedimentary, metamorphic, and hydrothermal environments, often forming in caves, limestone deposits, and hot springs
About This Crystal
The specimen is a carved decorative figurine of an angel, displaying a warm honey-yellow to pale orange color. It has a smooth, polished surface with a waxy to vitreous luster, showcasing internal cloudiness and subtle banding typical of massive carbonate minerals.
Physical Characteristics
Yellow body color with a white streak. Perfect rhombohedral cleavage in three directions at 75-degree angles, though obscured by the carving. Conchoidal to uneven fracture. Specific gravity is approximately 2.71. Brittle tenacity. Exhibits strong effervescence in dilute hydrochloric acid and potential white or yellow fluorescence under UV light.
Optical Properties
Uniaxial negative optical sign with extreme birefringence (double refraction). Refractive index ranges from 1.486 to 1.658.
Hardness & Durability
Origin Region
Worldwide, with significant deposits in Mexico, Brazil, and the USA
Hardness & Durability
Mohs hardness of 3, making it very soft and easily scratched by a copper coin or knife. Low durability for jewelry, highly susceptible to scratching and chemical erosion.
Care & Maintenance
Clean with a soft, damp cloth. Avoid harsh chemicals, acids, and prolonged exposure to direct sunlight. Do not submerge in water for extended periods due to water solubility.
Rarity & Value
Common mineral, but carved decorative items vary in price based on craftsmanship, size, and stone quality. Generally affordable and widely available.
Special Characteristics
Famous for its extreme double refraction (birefringence) in transparent crystal forms, and vigorous effervescence when exposed to acid.
Lore & History
In crystal healing traditions, yellow calcite is associated with the solar plexus chakra, believed to enhance clarity of mind, boost confidence, and promote emotional well-being. Historically, calcite has been widely used by various ancient cultures for carving, ornamentation, and architectural materials like limestone and marble.