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Goldenite comes in white and black varieties coated with a patterned gold layer. The black stones are hornblende a common natural rock composed primarily of iron, magnesium, potassium, and calcium. The white stones are white quartzite, a rock made up of interlocking quartz grains.

Goldenite Polished
Goldenite Classification
Common Name Goldenite
Species Hornblende
Goldenite Optical Properties
Transparency Translucent - Opaque
Refractive Index 1.544-1.553
Tolerance:very constant
Birefringence 0.009
Optic Character Uniaxial
Optic Sign Positive
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Pleochroism None
Goldenite Characteristic Physical Properties
Hardness 7
Specific Gravity 2.640-2.690 Typical:2.660
Toughness Good
Inclusions CO2 or H2O inclusions that give the stone a milky appearance. Gold foil has been applied to the surface of the stone.
Luster Vitreous, Metallic
Stability Good
Fracture Conchoidal
Cleavage None
Goldenite Chemistry & Crystallography
Chemical Name silicon dioxide (aka silica)
Chemical Formula SiO2
Crystal System Trigonal
Chemistry Classification Silicate

Goldenite Colors

  • Black Goldenite Black
  • White Goldenite White

Alternate Names


Countries of Origin

United States of America (the); Brazil


Normal care

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Tim Matthews


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.