mineral

Amazonite in Quartz

K(AlSi3O8) - Potassium Feldspar with Quartz (SiO2)

Hardness: 6-6.5 (Amazonite), 7 (Quartz). Color: Turquoise blue-green mixed with smoky-grey to white translucent quartz. Luster: Vitreous to pearly. Crystal Structure: Triclinic (Amazonite), Trigonal (Quartz). Cleavage: Perfect in two directions at nearly 90 degrees for amazonite.

Hardness: 6-6
Luster: Vitreous to pearly

Identified July 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed in granitic pegmatites and hydrothermal veins through late-stage magmatic crystallization. The distinctive blue-green color of Amazonite is caused by trace amounts of lead and water within the feldspar structure.

Uses & applications

Used primarily as lapidary material, decorative carvings, cabochons, wire-wrapping jewelry, and as educational/collection specimens.

Geological facts

Amazonite is named after the Amazon River, though no deposits exist there. It is a green-blue variety of microcline feldspar often associated with smoky quartz in famous pegmatite regions like Pikes Peak, Colorado.

Field identification & locations

Identified by its distinctive robin-egg blue to teal color paired with translucent quartz matrix. Commonly found in pegmatite deposits worldwide including Brazil, Madagascar, Russia, and Colorado, USA. Collectors value contrast between the blue amazonite and dark quartz.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Soil with Mineral Detritus and Quartz Fragments

Regolith / Silicate Mineral Aggregate

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Limonite / Goethite (Iron Ore Mineral nodule)

FeO(OH)·nH2O / FeO(OH)

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Schist

Metamorphic

Septarian Pebble

Septarian nodule / Concretion

sedimentary

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

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