Aquamarine
Beryl var. Aquamarine · Precious Gemstone
Crystal System
Hexagonal system, forming prismatic crystals
Mineral Group
Silicates (Cyclosilicates)
Chemical Formula
Be3Al2Si6O18 with traces of Fe2+ and Fe3+
Formation Process
Pegmatitic and hydrothermal, crystallizing in cavities and veins at high temperatures and pressures
About This Crystal
Spherical polished beads displaying pale grayish-blue to greenish-blue hues with a sub-vitreous to waxy luster, showing semi-translucent to translucent transparency and natural internal inclusions
Physical Characteristics
Pale blue-green body color, white streak, no distinct cleavage, conchoidal to uneven fracture, specific gravity of approximately 2.67 to 2.74, brittle tenacity, and generally inert under UV light
Optical Properties
Doubly refractive with a uniaxial negative optical character, refractive index ranging from 1.570 to 1.590, weak pleochroism showing colorless-blue to blue-green shades
Hardness & Durability
Origin Region
Brazil, Madagascar, Pakistan, Russia, Zambia, and the United States
Hardness & Durability
Mohs hardness of 7.5 to 8, good durability for jewelry wear though vulnerable to sharp impacts along potential parting planes
Care & Maintenance
Clean with warm soapy water using a soft brush, avoid harsh chemicals, ultrasonic cleaners, and prolonged direct sunlight to prevent color alteration
Rarity & Value
Moderately common to rare depending on clarity and color saturation; heat treatment is frequently applied to enhance the blue coloration by reducing green tones
Special Characteristics
May occasionally exhibit chatoyancy (cat's eye effect) or asterism when cut en cabochon, along with fine tubular liquid or gas-filled inclusions
Lore & History
Historically revered by ancient sailors as a talisman for safe voyages across the seas; associated in modern crystal lore with the throat chakra, calming energies, and clear communication