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Named for its beryllium content, beryllonite is a colorless to white or pale yellowish crystal. It is usually transparent with a vitreous to pearly luster, and is often heavily included. This rare gem is found in only a few places around the world, notably in Maine, USA.

Beryllonite Polished
Beryllonite Classification
Common Name Beryllonite
Species Beryllonite
Beryllonite Optical Properties
Transparency Transparent
Dispersion Strength: Weak Fire Value: 0.010
Refractive Index 1.552-1.561
Birefringence 0.009- 0.010
Optic Character Biaxial
Optic Sign Negative
Polariscope Reaction Doubly Refractive (DR)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism None
Beryllonite Characteristic Physical Properties
Hardness 5.5-6
Streak White
Specific Gravity 2.790-2.870
Toughness Poor
Inclusions Beryllonite is typically included and will have fluid inclusions.
Luster Vitreous
Fracture Conchoidal
Cleavage Perfect
Beryllonite Chemistry & Crystallography
Chemical Name sodium beryllium phosphate
Chemical Formula NaBePO4
Crystal System Monoclinic
Chemistry Classification Phosphate

Beryllonite Colors

  • Yellow Beryllonite Yellow
  • Colorless Beryllonite Colorless
  • White Beryllonite White

Countries of Origin


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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.