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Mesolite is a zeolite mineral that occurs in delicate, needle-like crystal structures that radiate from its base. Prized by collectors for its striking crystal formation, mesolite is typically white or colorless, but occasionally light yellow in color. Large specimens are very rare, and faceted gems are almost non-existent.

Mesolite Classification
Common Name Mesolite
Species Mesolite
Mesolite Optical Properties
Transparency Transparent - Opaque
Dispersion Strength: strong fire
Refractive Index 1.504-1.508
Birefringence 0.001
Optic Character Biaxial
Optic Sign Positive
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism Unobservable
Mesolite Characteristic Physical Properties
Hardness 5-5.5
Streak White
Specific Gravity 2.260-2.400 Typical: 2.26
Inclusions Mesolite has clusters of radiating needle like crystals and is silky in appearance if fibrous.
Luster Silky, Vitreous
Fracture Uneven
Cleavage Perfect, in two directions
Mesolite Chemistry & Crystallography
Chemical Formula Na2Ca2Si9Al6O30.8H2O
Crystal System Orthorhombic
Chemistry Classification Silicate

Mesolite Colors

  • Yellow Mesolite Yellow
  • White Mesolite White
  • Colorless Mesolite Colorless
  • Gray Mesolite Gray

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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.