Yellow Calcite
Calcite · Mineral Specimen
Crystal System
Trigonal, with rhombohedral or scapolite-like massive and scalenohedral habits
Mineral Group
Carbonates
Chemical Formula
CaCO3
Formation Process
Sedimentary, metamorphic, and hydrothermal environments, often formed by low-temperature precipitation from aqueous solutions
About This Crystal
A clustered cluster of honey-yellow to golden calcite crystals, exhibiting translucent to semi-transparent clarity with a vitreous to resinous luster. The individual crystals show rhombohedral and scalenohedral forms stacked together compactly.
Physical Characteristics
Color ranges from pale yellow to deep honey; white streak; perfect rhombohedral cleavage in three directions at 75-degree angles; conchoidal to uneven fracture; specific gravity of approximately 2.71; brittle tenacity; strong effervescence in dilute hydrochloric acid
Optical Properties
Uniaxial negative with strong birefringence, resulting in a pronounced double refraction effect when viewed through clear specimens
Hardness & Durability
Origin Region
Globally distributed; major sources include Mexico, Madagascar, USA (Tennessee), and Brazil
Hardness & Durability
Mohs hardness of 3; poor toughness due to perfect cleavage; sensitive to acids and scratching; not recommended for everyday jewelry wear
Care & Maintenance
Clean with mild soap and warm water; avoid all acids, harsh chemicals, ultrasonic cleaners, and prolonged exposure to direct sunlight
Rarity & Value
Common; value depends on crystal size, perfection, clarity, and color saturation, ranging from affordable mineral specimens to higher-end collector pieces
Special Characteristics
Often exhibits strong white, pink, or yellow fluorescence under ultraviolet (UV) light and may show phosphorescence
Lore & History
Traditionally associated with the solar plexus chakra, believed by crystal practitioners to promote clarity of mind, self-confidence, and emotional healing, though these are non-scientific cultural beliefs