Aventurine

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Distinguished by a glittering metallic shimmer called aventurescence, aventurine is a variety of quartz whose sparkle comes from aligned flakes of fuchsite mica. It appears most famously in green but also in reddish brown, blue, and orange, and it registers roughly 6.5 to 7.0 on the Mohs scale. The finest green material comes from India, where it has been carved into beads and figurines for centuries, while blue aventurine is drawn from Brazil and reddish specimens from Norway. Affordable, durable, and moderately priced, it remains one of the most widely used semi-precious stones for jewelry and decorative carving.

Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 7,0 – 6,5

Specific Gravity 2,64 – 2,69

Refractive Index 1,544 – 1,553

Crystal System Triclinic

Cleavage None

Fracture Conchoidal,Splintery

Color various

Birefringence 0,007

Pleochroism Absent

Mohs Hardness

Mohs hardness of Aventurine shown against the ten reference minerals, from talc (1) to diamond (10).

Mohs	Reference mineral	Aventurine
1	Talc
2	Gypsum
3	Calcite
4	Fluorite
5	Apatite
6	Orthoclase
7	Quartz
8	Topaz
9	Corundum
10	Diamond

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

Where to Buy Aventurine

Blue Nile Fine jewelry retailer

James Allen Gemstone jewelry

Brilliant Earth Ethically sourced gems

Amazon Wide selection

Links may earn a commission at no extra cost to you.

About Aventurine

A aventurina é uma variedade de quartzo que exibe um fenómeno óptico denominado aventurescência — um brilho cintilante causado por inclusões de minerais reflectores como a fuchsite (conferindo a cor verde), a hematite ou a goethite (para tons avermelhados e castanhos). A variedade mais comum e apreciada é a aventurina verde, frequentemente confundida com jade ou malaquite. É muito utilizada em joalharia como cabochões, contas e pendentes, bem como em objectos decorativos e esculturas. Associada à prosperidade e sorte em muitas tradições culturais, é uma das pedras semi-preciosas mais populares do mundo.