Aventurine Quartz

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Aventurine is a form of quartz, distinguished by its translucent to opaque appearance and the presence of mineral inclusions that give a shimmering or glittery effect termed aventurescence. The phenomenon of aventurescence is caused by small leaf-like or plate-like inclusions, usually mica, distributed throughout the host material. Light striking the surface of these inclusions is reflected back to the viewer, creating an eye-catching sparkle. While customarily green in color, aventurine may also be found in colors ranging from blue, orange, white, yellow, reddish-brown to gray.

Aventurine Quartz Polished
Aventurine Quartz Classification
Common Name Aventurine Quartz
Species Quartzite
Aventurine Quartz Optical Properties
Transparency Translucent - Opaque
Refractive Index 1.544-1.553
Tolerance:very constant
Birefringence 0.009
Polariscope Reaction Aggregate (AGG)
Fluorescence SWUV: Inert to weak grayish green or reddish
LWUV: Inert to weak grayish green or reddish
Pleochroism None
Aventurine Quartz Characteristic Physical Properties
Hardness 7
Streak White
Specific Gravity 2.640-2.690 Typical:2.660
Toughness Good
Inclusions Aventurine quartz will have green disk-like chrome-mica fuchsite flakes or platlets that can be seen with magnification.
Luster Vitreous
Stability Good
Fracture Conchoidal, Granular
Cleavage None
Aventurine Quartz Chemistry & Crystallography
Chemical Name silicon dioxide (aka silica)
Chemical Formula SiO2
Crystal System Trigonal
Chemistry Classification Silicate

Aventurine Quartz Colors

  • Brown Aventurine Quartz Brown
  • Yellow Aventurine Quartz Yellow
  • Red Aventurine Quartz Red
  • Pink Aventurine Quartz Pink
  • Orange Aventurine Quartz Orange
  • Green Aventurine Quartz Green

Alternate Names

Aventurine

Countries of Origin

Tanzania, United Republic Of; Canada; Myanmar; United States of America (the); Unknown; China; Brazil; South Africa; India

History

Aventurine is distinguished by its translucent to opaque appearance and the presence of mineral inclusions that give a shimmering or glittery effect termed "aventurescence". The phenomenon of aventurescence is caused by small leaf-like or plate-like inclusions, usually mica, distributed throughout the host material. Light striking the surface of these inclusions is reflected back to the viewer, creating an eye-catching sparkle. While customarily green in color, aventurine may also be found in colors ranging from blue, orange, white, yellow, reddish-brown to gray.

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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.