Capiz Shell

saf-ahyuh r

Capiz Shells come from the province of Capiz and the island of Samal in the Philippines. The shells are often called windowpane oysters because they have been harvested for 1,000’s of years for use as windowpanes. Capiz shells are also used today as chandeliers, lampshades, decorative objects, clothing decoration and jewelry. The shells are translucent in their natural state and turns opaque when heated. When shells are heated for longer periods of time the shells turn a smoky brown color. Shells are also dyed fashionable colors.

Capiz Shell Polished
Capiz Shell Classification
Common Name Capiz Shell
Species Organic
Capiz Shell Optical Properties
Transparency Opaque-Transparent
Refractive Index 1.530-1.685
Polariscope Reaction Aggregate (AGG)
Capiz Shell Characteristic Physical Properties
Toughness Poor
Luster Pearly, Greasy
Fracture Uneven, splintery
Cleavage None
Capiz Shell Chemistry & Crystallography
Chemical Name calcium carbonate, conchiolin and water
Chemical Formula CaCO3 with H2O and other organic materials
Crystal System NA
Chemistry Classification Organic

Capiz Shell Colors

  • Bi-color Capiz Shell Bi-color
  • Yellow Capiz Shell Yellow
  • White Capiz Shell White
  • Red Capiz Shell Red
  • Purple Capiz Shell Purple
  • Pink Capiz Shell Pink
  • Orange Capiz Shell Orange
  • Multi-color Capiz Shell Multi-color
  • Green Capiz Shell Green
  • Gray Capiz Shell Gray
  • Brown Capiz Shell Brown
  • Blue Capiz Shell Blue
  • Black Capiz Shell Black

Alternate Names

Windowpane oyster

Countries of Origin

Philippines (the)


Shell is very soft, so be mindful of scratching. Avoid sudden temperature changes, chemicals, and ultrasonic cleaners. In addition to above precautions: avoid perfumes, and hairsprays.

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.