Emerald
Beryl var. Emerald · Precious Gemstone
Crystal System
Hexagonal system, typically forming prismatic crystals with hexagonal cross-sections
Mineral Group
Silicates (Cyclosilicate subgroup)
Chemical Formula
Be3Al2Si6O18 with trace amounts of Cr3+, V3+, and Fe3+
Formation Process
Hydrothermal and metamorphic processes where beryllium-rich fluids interact with chromium or vanadium-bearing host rocks under moderate temperatures and pressures
About This Crystal
An intense, deep green oval-cut or cabochon gemstone set in a silver-colored halo pendant surrounded by smaller clear stones. The central stone displays a rich dark green coloration, vitreous luster, and translucent to transparent clarity with characteristic internal inclusions known as 'jardin'
Physical Characteristics
Rich green body color, white streak, poor basal cleavage on {0001}, conchoidal to uneven fracture, specific gravity of approximately 2.67 to 2.78, brittle tenacity, and typically inert to weak red fluorescence under UV light
Optical Properties
Uniaxial negative with a refractive index ranging from 1.577 to 1.583, strong dichroism showing bluish-green to yellowish-green from different angles, and moderate birefringence of 0.005 to 0.009
Hardness & Durability
Origin Region
Colombia (Muzo, Chivor, Coscuez), Zambia, Brazil, Zimbabwe, and Pakistan; forms in tectonic-hydrothermal environments
Hardness & Durability
Mohs hardness of 7.5 to 8, but generally poor to moderate toughness due to numerous inclusions and fractures, making it susceptible to thermal and mechanical shock despite high hardness
Care & Maintenance
Avoid ultrasonic and steam cleaners due to internal fractures and oil or resin treatments; clean gently with warm soapy water and a soft brush; store separately to prevent scratching softer stones
Rarity & Value
Rare and highly valued precious gemstone; price is heavily determined by color saturation, transparency, lack of prominent inclusions, and geographical origin, with oil and resin fracture-filling being a common enhancement
Special Characteristics
Famous for its natural internal fingerprint-like inclusions and fractures known as 'jardin' (garden), which help gemologists distinguish natural emeralds from synthetics and treatments
Lore & History
Historically treasured by ancient Egyptians, Incas, and Roman civilizations as a symbol of rebirth, fertility, and eternal youth; associated with the heart chakra in modern crystal healing traditions for promoting unconditional love, compassion, and emotional healing