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Also called "rainbow calsilica," this is a man-made material that displays vibrant layers of bold color. It consists of a mixture of calcite, plastic and coloring pigments. This unique stone is often used in jewelry and carvings to show off its distinctive coloration.

Calsilica Polished
Calsilica Classification
Common Name Calsilica
Species Calsilica
Calsilica Optical Properties
Transparency Opaque
Polariscope Reaction Aggregate (AGG)
Fluorescence SWUV: Variable
LWUV: Variable
Pleochroism None
Calsilica Characteristic Physical Properties
Specific Gravity 1.880-1.920
Inclusions Calsilica has multicolored stripes or layers of granular material. Occasionally bubbles plastic-like material or bubbles are seen between layers.
Cleavage None
Calsilica Chemistry & Crystallography
Chemical Name calcium carbonate + dye and plastic
Chemical Formula Ca(CO3)+dye and plastic
Crystal System NA
Chemistry Classification Carbonate

Calsilica Colors

  • Purple Calsilica Purple
  • Yellow Calsilica Yellow
  • Orange Calsilica Orange
  • Multi-color Calsilica Multi-color
  • Green Calsilica Green
  • Blue Calsilica Blue
  • Pink Calsilica Pink

Alternate Names

Rainbow Calsilica

Countries of Origin

Unknown; China; Mexico


Calsilica is a man-made material that offers a world of color-bright options. It's often called "rainbow calsilica", because of the bands of bright color that shine in every stone. The cheery stones known as rainbow calsilica add vibrant color to any jewelry collection.


Do not expose calsilica to steam or ultrasonic cleaners; avoid chemicals. Wipe clean with a dry cloth.

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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.