Mineral

Aventurine and Amazonite

Silicon Dioxide (SiO2) with inclusions and Microcline (KAlSi3O8)

Aventurine: Hardness 6.5-7, green, waxy to vitreous luster, hexagonal system. Amazonite: Hardness 6-6.5, blue-green with white streaking, vitreous luster, triclinic system.

Identified April 20, 2026More mineral →

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Physical properties

Aventurine: Hardness 6.5-7, green, waxy to vitreous luster, hexagonal system. Amazonite: Hardness 6-6.5, blue-green with white streaking, vitreous luster, triclinic system.

Formation & geological history

Aventurine forms in magmatic deposits and metamorphic rocks. Amazonite forms in granitic pegmatites and hydrothermal veins, typically crystallized within the Earth's crust over millions of years.

Uses & applications

Predominantly used for ornamental carvings, jewelry (cabochons and beads), and as metaphysical healing stones for collectors.

Geological facts

The 'shimmer' in green aventurine is called aventurescence, caused by tiny flakes of green fuchsite mica. Amazonite was named after the Amazon River, though no deposits exist there (it was likely confused with other green stones).

Field identification & locations

Identify aventurine by its grainy texture and internal mica flecks; identify amazonite by its distinctive bright turquoise-green color and white 'grid' or 'perthitic' texture. Common in Brazil, India, and Russia.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral