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Andesine-Labradorite is a beautiful crystalline gem that is a combination of two feldspar varieties: andesine and labradorite. Its name "andesine" refers to the Andes Mountains where andesine was first found and the name "labradorite" was derived from Labrador, Canada, where labradorite was first discovered. So why the hyphenated name? Chemically speaking, our material falls between andesine and labradorite, so we chose to hyphenate and use both terms to be more accurate and descriptive.

Andesine-Labradorite Polished
Andesine-Labradorite Classification
Common Name Andesine-Labradorite
Species Feldspar
Andesine-Labradorite Optical Properties
Transparency Transparent - Semitranslucent
Refractive Index 1.558-1.570
Birefringence 0.009
Optic Character Biaxial
Optic Sign Positive or Negative
Polariscope Reaction Doubly Refractive (DR)
Pleochroism None
Andesine-Labradorite Characteristic Physical Properties
Hardness 6-6.5
Streak White
Specific Gravity 2.640-2.740
Toughness Poor
Luster Vitreous
Stability Good
Cleavage Perfect, in two directions
Andesine-Labradorite Chemistry & Crystallography
Chemical Name calcium or sodium silicate
Chemical Formula NaAlSi3O8 or CaAl2Si2O8
Crystal System Triclinic
Chemistry Classification Silicate

Andesine-Labradorite Colors

  • Green Andesine-Labradorite Green
  • Yellow Andesine-Labradorite Yellow
  • Orange Andesine-Labradorite Orange
  • Red Andesine-Labradorite Red
  • White Andesine-Labradorite White
  • Gray Andesine-Labradorite Gray
  • Colorless Andesine-Labradorite Colorless

Countries of Origin

Mongolia; Unknown; China; Congo (the); Brazil; India

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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.