Amazonite
Microcline var. Amazonite · Semi-Precious Gemstone
Crystal System
Triclinic, typically forms as massive or tabular crystal aggregates
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
KAlSi3O8
Formation Process
Pegmatitic and hydrothermal, crystallizing at high temperatures from cooling magmatic fluids containing potassium, aluminum, and silicon
About This Crystal
Smooth, spherical beads displaying a range of green, blue-green, and pale turquoise hues with characteristic white mottling or grid-like inclusions (tartan twinning), showing a vitreous to waxy luster
Physical Characteristics
Color varies from bright green to turquoise blue, white streak, good cleavage in two directions at near right angles, uneven to conchoidal fracture, specific gravity of 2.56-2.58, brittle tenacity, inert under UV light
Optical Properties
Biaxial negative, refractive index of 1.514-1.530, weak pleochroism, displays characteristic grid-like twinning (albite and pericline twinning) visible under magnification
Hardness & Durability
Origin Region
Russia, United States, Madagascar, Brazil, and Peru; found in pegmatites and granitic rocks
Hardness & Durability
Mohs hardness of 6 to 6.5, fair toughness, sensitive to sudden temperature changes and pressure due to cleavage planes, moderate wearability for jewelry
Care & Maintenance
Clean with warm soapy water and a soft brush, avoid ultrasonic cleaners and harsh chemicals, store away from harder stones to prevent scratching, protect from prolonged direct sunlight
Rarity & Value
Common to uncommon; value depends on intense blue-green color saturation, lack of white streaks, and size; affordable price range for standard beads
Special Characteristics
Distinctive lattice or tartan pattern caused by microcline twinning combined with lead and water impurities responsible for the distinct green-blue color
Lore & History
Associated with ancient Mesopotamian myths involving the warrior goddess Tiamat; traditionally linked to the heart and throat chakras, symbolizing truth, courage, harmony, and soothing energy in modern crystal healing