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Larimar is a rare blue to green variety of pectolite, a mineral prized mainly by specimen collectors. While pectolite may be found in several locations, including Canada, England and the U.S., larimar is found only in the Dominican Republic. This unique blue gem formed as a result of volcanic activity millions of years ago that created the Caribbean island of Hispaola. The most prized larimar exhibits sky blue color with a white pattern throughout, quite similar to the look of sunlight dancing on the floor of a pool. This gem was named by its discoverer for both his daughter, Larissa, and el mar, the sea.

Larimar Polished
Larimar Classification
Common Name Larimar
Species Pectolite
Larimar Optical Properties
Transparency Opaque-Opaque
Refractive Index 1.590-1.630 Tolerance: (+0.017/-0.004)
Birefringence 0.029-0.038
Optic Character Biaxial
Optic Sign Positive
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence SWUV: Inert to strong greenish yellow or orange
LWUV: Inert to moderate greenish yellow or orange
Pleochroism None
Larimar Characteristic Physical Properties
Hardness 4.5-6.0
Streak White
Specific Gravity 2.620-2.900 Typical:2.810
Toughness Varies
Inclusions Under magnification larimar has tiny spheres that have blue center and white outer edge.
Luster Vitreous, Silky
Fracture Uneven, Splintery
Cleavage Perfect, in two directions
Larimar Chemistry & Crystallography
Chemical Formula NaCa2Si3O8(OH)
Crystal System Triclinic
Chemistry Classification Silicate

Larimar Colors

  • Gray Larimar Gray
  • Blue Larimar Blue
  • White Larimar White

Countries of Origin

Dominican Republic (the)


Larimar is soft, so be mindful of scratching. Requires gentle handling. Care turn white if exposed to jewelers torch.

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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.