Stilbite

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Stilbite is named from a Greek term meaning "to glitter" due to the pearly luster of the mineral. A member of the zeolite group, stilbite is often white, peach, pinkish, yellow or brown in color. Stilbite is further classified based on its sodium and calcium content. Stilbite is rarely faceted, but its attractive crystals make it highly collectable as mineral specimens

Stilbite Classification
Common Name Stilbite
Species Stilbite
Stilbite Optical Properties
Transparency Transparent - Opaque
Dispersion Strength: Weak Fire
Refractive Index 1.484-1.513
Birefringence 0.01-0.013
Optic Character Biaxial
Optic Sign Negative
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism Unobservable
Stilbite Characteristic Physical Properties
Hardness 3.5-4
Streak White
Specific Gravity 2.100-2.200
Toughness Poor
Luster Vitreous, Pearly
Fracture Conchoidal
Cleavage Perfect, in one direction
Stilbite Chemistry & Crystallography
Chemical Formula NaCa4(Si27Al9)O72 28(H2O)
Crystal System Monoclinic
Chemistry Classification Silicate

Stilbite Colors

  • Yellow Stilbite Yellow
  • White Stilbite White
  • Pink Stilbite Pink
  • Orange Stilbite Orange
  • Multi-color Stilbite Multi-color
  • Brown Stilbite Brown
  • Colorless Stilbite Colorless
  • Red Stilbite Red
  • Gray Stilbite Gray

Alternate Names

Desmine, Stilbite-Ca

Countries of Origin

Canada; United States of America (the); Unknown; Russian Federation (the); Brazil; India

Care

Soluble in hydrochorlic acid

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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.