Aquamarine
Beryl var. Aquamarine · Semi-Precious Gemstone
Crystal System
Hexagonal crystal system, typically forming prismatic crystals, though this specimen is tumbled and polished into an irregular smooth pebble shape.
Mineral Group
Silicates (Cyclosilicate subgroup)
Chemical Formula
Be3Al2Si6O18
Formation Process
Igneous and hydrothermal processes, crystallizing within granitic pegmatites and cavities from cooling magma rich in beryllium, silicon, and aluminum, often under high temperatures and pressures.
About This Crystal
The specimen is a small, tumbled, and polished pebble of pale icy-blue beryl. It exhibits translucent to semi-transparent clarity with a smooth, rounded surface typical of tumbled stones, showing a vitreous to waxy luster.
Physical Characteristics
Pale pastel blue body color with a white streak. It has poor to indistinct cleavage, a conchoidal to uneven fracture, and a specific gravity of approximately 2.60 to 2.90. It is brittle with no notable magnetism or strong fluorescence.
Optical Properties
Singly or weakly doubly refractive with a refractive index of approximately 1.577 to 1.583. Exhibits faint dichroism in better quality specimens, showing colorless-to-blue or blue-to-greenish-blue hues.
Hardness & Durability
Origin Region
Notable sources include Brazil, Madagascar, Pakistan, Russia, and the United States. Forms primarily in granitic pegmatites and hydrothermal veins.
Hardness & Durability
Mohs hardness of 7.5 to 8, making it durable and very suitable for everyday jewelry wear like rings and pendants, with good toughness.
Care & Maintenance
Safe to clean with warm soapy water and a soft brush. Avoid harsh chemicals, extreme thermal shock, and prolonged direct sunlight to maintain optimal color stability.
Rarity & Value
Common to moderately rare depending on saturation and clarity. Deep blue saturated specimens command high values, whereas pale tumbled stones like this are widely available and affordable.
Special Characteristics
Often features fine parallel growth tubes or liquid inclusions, though this polished tumbled piece is mostly clear with a uniform soft blue tint.
Lore & History
Historically used by sailors as a talisman of protection, courage, and safe passage across stormy seas. In modern crystal healing, it is traditionally associated with the throat chakra, tranquility, and emotional clarity.