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Blue-green specimens of microline are called amazon stone or amazonite, named for its supposed discovery location near the Amazon River. Amazonite that is used in jewelry is generally cut into cabochons. Gem-quality amazonite is found in the Ilmen and Ural Mountains of Russia, the Pikes Peak district of Colorado and in Minas Gerais, Brazil.

Amazonite Polished
Amazonite Classification
Common Name Amazonite
Species Feldspar
Amazonite Optical Properties
Transparency Semitranslucent - Opaque
Dispersion Strength: None
Refractive Index 1.522-1.530
Birefringence 0.008
Optic Character Biaxial
Optic Sign Negative
Polariscope Reaction Aggregate (AGG)
Fluorescence SWUV: Inert
LWUV: Inert to weak yellowish green
Pleochroism None
Amazonite Characteristic Physical Properties
Hardness 6-6.5
Streak White
Specific Gravity 2.540-2.580 Typical:2.560
Toughness Poor
Inclusions mottled coloring with grid-like white streaks or patterns are caused by the presence of quartz or plagioclase feldspar
Luster Vitreous, Greasy
Fracture Uneven, Splintery
Cleavage Perfect, in two directions
Amazonite Chemistry & Crystallography
Chemical Name potassium aluminum silicate
Chemical Formula KAlSi3O8
Crystal System Triclinic
Chemistry Classification Silicate

Amazonite Colors

  • Blue Amazonite Blue
  • Green Amazonite Green

Alternate Names

Amazon Stone

Countries of Origin

Canada; Mozambique; United States of America (the); Unknown; China; Russian Federation (the); Brazil; Madagascar; Zambia; Peru


The blue green hues of amazonite evoke tranquility and rainforest images. Its color is almost calming and amazonite is never boring. Variations of color from the subtlest, almost baby-blue green to the intense, blue-greens of the ancient amazon ensure that every stone is a unique beauty. Amazonite is a member of the feldspar family and has a wearable hardness of 6 - 6 1/2 on the Mohs scale. It's usually fashioned en cabochon to optimize its nuances of color, clarity, and pattern. AKA Microcline feldspar


Avoid hard wear, heat, chemicals and ultrasonic cleaners.

More About Amazonite

The ancient Egyptians considered amazonite to be a stone of courage and used it extensively in jewelry and as decorative accents. The 27th chapter of the Egyptian Book of the Dead was carved on amazonite and it's generally agreed that it is the third stone in the breastplate of Moses. Some cultures believe amazonite is named for the much-discussed and disputed matriarchal societies of centuries ago. The image of a strong and powerful woman has its appeal when connected to the boy-blue-green of amazonite. People who believe in the metaphysical consider amazonite to be a soothing stone. While we have no scientific evidence of this benefit, we agree that it’s easy color has a soothing appeal.

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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.