saf-ahyuh r

Scolecite is a fascinating zeolite mineral. Its name is derived from the Greek word, skolex, meaning worm because under a flame, scolecite curls up like a worm. It shares the unusual properties of piezoelectricity and pyroelectricity with other gem minerals like tourmaline.

Scolecite Polished
Scolecite Classification
Common Name Scolecite
Species Scolecite
Scolecite Optical Properties
Transparency Transparent - Opaque
Dispersion Strength: Strong Fire
Refractive Index 1.509-1.525
Birefringence 0.007-0.012
Optic Character Biaxial
Optic Sign Negative
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence SWUV: Inert to weak yellow
LWUV: Inert to weak bluish white
Pleochroism Unobservable
Scolecite Characteristic Physical Properties
Hardness 5-5.5
Streak White
Specific Gravity 2.210-2.290
Toughness Poor
Luster Vitreous, Silky
Fracture Uneven
Cleavage Perfect, in two directions
Scolecite Chemistry & Crystallography
Chemical Formula CaAl2Si3O10.3H2O
Crystal System Monoclinic
Chemistry Classification Silicate

Scolecite Colors

  • Green Scolecite Green
  • White Scolecite White
  • Colorless Scolecite Colorless
  • Pink Scolecite Pink
  • Red Scolecite Red
  • Brown Scolecite Brown

Countries of Origin

Unknown; India


Soft and brittle, so be mindful of scratching. Not suitable for most jewelry uses.

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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.