Bronzite

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Bronzite is an iron-bearing variety of enstatite distinguished by its green-brown color and bronze-like sub-metallic luster with fibrous inclusions. Enstatite is a silicate and a member of the pyroxene group. Appreciated for its sheen, bronzite is sometimes polished to make small ornamental objects.

Bronzite Polished
Bronzite Classification
Common Name Bronzite
Species Enstatite
Bronzite Optical Properties
Transparency Transparent - Opaque
Refractive Index 1.665-1.703
Tolerance:(+0.010/-0.010)
Birefringence 0.008-0.015
Optic Character Biaxial
Optic Sign Positive
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence SWUV: inert
LWUV: inert
Pleochroism Trichroic, strong green, yellow, and reddish brown
Bronzite Characteristic Physical Properties
Hardness 5-6
Streak White Or Brownish
Specific Gravity 3.300-3.430 Typical:3.350
Toughness Poor
Inclusions Bronzite has fibrous inclusions and might show schiller effect.
Luster Vitreous, Metallic
Fracture Uneven
Cleavage Good, in one direction
Bronzite Chemistry & Crystallography
Chemical Name magnesium iron silicate
Chemical Formula (Mg,Fe)2Si2O6
Crystal System Orthorhombic
Chemistry Classification Silicate

Bronzite Colors

  • Brown Bronzite Brown

Countries of Origin

Brazil

History

This stone has earthy appeal and is most often found in cabochons or beads. It's a variety of enstatite and is named for the bronze-like appearance created by the presence of iron. It often has a metallic-like shimmer and is found in opaque, translucent, and transparent greenish-brown shades. Inclusions add distinction to individual stones. With a hardness of 5 1/2 on the Mohs scale, it's very wearable in a multitude of ways. When polished, bronzite has a lot to recommend it.

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More About Bronzite

We found interesting contemporary folklore surrounding this stone. Our favorite is that bronzite may inspire you to act with honor.

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Tim Matthews

Author

Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.