Aquamarine
Beryl var. Aquamarine · Semi-Precious Gemstone
Crystal System
Hexagonal system; typically forms prismatic hexagonal crystals, but as a tumbled gemstone it is worked into polished spherical beads.
Mineral Group
Silicates (Cyclosilicate subgroup)
Chemical Formula
Be3Al2Si6O18
Formation Process
Pegmatitic and hydrothermal formation, crystallizing from cooling magmatic fluids rich in beryllium, aluminum, silicon, and trace amounts of iron under high temperatures and pressures.
About This Crystal
The specimen is a beaded bracelet composed of spherical polished gemstones exhibiting a pale greenish-blue to light blue color. The beads show a translucent to semi-translucent quality with a vitreous to waxy luster, displaying subtle internal cloudiness and natural growth inclusions typical of genuine beryl.
Physical Characteristics
Color ranges from pale blue to light greenish-blue; white streak; no true cleavage distinct in beads (imperfect basal cleavage in raw crystals); conchoidal to uneven fracture; specific gravity of approximately 2.60 to 2.90; brittle tenacity; generally inert under UV light.
Optical Properties
Singly or weakly doubly refractive with a refractive index of approximately 1.570 to 1.590; low birefringence of about 0.005 to 0.009; weak to moderate pleochroism showing colorless to blue depending on orientation.
Hardness & Durability
Origin Region
Notable sources include Brazil, Madagascar, Pakistan, Russia, and the United States. It typically forms in granitic pegmatites and hydrothermal cavities.
Hardness & Durability
Mohs hardness of 7.5 to 8, making it durable and suitable for everyday jewelry wear including bracelets and rings; good toughness, though vulnerable to sharp impacts along potential cleavage planes.
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals, ultrasonic cleaners if inclusions are heavy, and prolonged exposure to direct sunlight to maintain optimal color stability.
Rarity & Value
Uncommon to Moderately Rare depending on color saturation; higher value is attributed to deep ocean-blue specimens, while lighter pale blue or greenish stones are more common and affordable. Gentle heat treatment is sometimes used to remove green undertones.
Special Characteristics
Displays subtle internal variations, natural liquid and mineral inclusions, and a calming watery luminescence characteristic of high-quality beryl varieties.
Lore & History
Historically used by ancient sailors as a protective talisman against drowning and storms. Associated in modern crystal healing traditions with the throat chakra, tranquility, emotional clarity, and stress relief, though these are cultural beliefs rather than scientifically proven claims.