saf-ahyuh r

Named for its resemblance to zoisite, clinozoisite is a colorless to pale grayish-yellow to green-colored mineral ideal for faceting. This gem was first discovered in Austria 1896, but there are many locations world wide where specimens have been found.

Clinozoisite Polished
Clinozoisite Classification
Common Name Clinozoisite
Species Clinozoisite
Clinozoisite Optical Properties
Transparency Transparent - Translucent
Refractive Index 1.670-1.734
Birefringence 0.010
Optic Character Biaxial
Optic Sign Positive
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism Unobservable
Clinozoisite Characteristic Physical Properties
Hardness 6-7
Streak White To Gray
Specific Gravity 3.210-3.380
Toughness Poor
Luster Vitreous
Fracture Uneven
Cleavage Perfect, in one direction
Clinozoisite Chemistry & Crystallography
Chemical Name calcium aluminum silicate hydroxide
Chemical Formula Ca2Al3(SiO4)3(OH)
Crystal System Monoclinic
Chemistry Classification Silicate

Clinozoisite Colors

  • Pink Clinozoisite Pink
  • Yellow Clinozoisite Yellow
  • Green Clinozoisite Green
  • Brown Clinozoisite Brown
  • Colorless Clinozoisite Colorless

Countries of Origin

Pakistan; Brazil

Sisk Gemology Reference

Showcasing 200 gemstones in over 1,000 pages and accompanied by more than 2,000 photos, The Sisk Gemology Reference is a must-have in every collector’s library. Each comprehensive, three-volume set features state-of-the-art photography, detailed illustrations, and scientifically precise descriptions to create an entrancing experience for gemstone amateurs and afficionados alike.

Shop Now

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.