The windowpane oyster (Placuna placenta) is a bivalve marine mollusk in the family of Placunidae. They are edible, but valued more for the shells and pearls. The shells have been used for thousands of years as a glass substitute because of their durability and translucence. More recently they have been used in the manufacture of decorative items like chandeliers and lampshades. In this use the shell is known as capiz. Shells are also used as raw materials for glue, chalk, and varnish.
The almost-flat shells of the capiz can grow to over 150 mm (5.9 in) in diameter, reaching maturity between 70 to 100 mm (2.8 to 3.9 in); securing the shells is a V-shaped ligament. Males and females are distinguished by the color of the gonads. Fertilization is external and larvae are free-swimming like plankton for 14 days or attached to surfaces via byssal thread during metamorphosis, eventually settling on the bottom. They consume plankton filtered from the water passing through their slightly opened shell; the shell closes if the bivalve is above water during low tide.
Shells are used as a raw material in the manufacture of glue, chalk, varnish, window panes, chandeliers, and lampshades. The primary exporter of products is Capiz province in the Philippines where it is known as kapis. – Source
Known as one of the most versatile and elegant decorating raw materials, the Capiz shells are very important part of the culture of the local Capiznon. It is bread and butter source for many locals who engage in developing all sorts of designs for use as ornamental decoration in houses. The Capiz shells when used as ornaments and decors turn simple living into elegant and cozy-looking environment. It is well known to be a good indoor as well as outdoor décor major raw material. The Capiz shell products are also very well recognized in the world market because Capiz is the only living paradise for the Capiz shells that can be found in their vast sea treasure chest.
Some popular Capiz shell chips decorating design include gift items, indoor decoration and outdoor decoration ornaments. Capiz chip-made products range from lanterns, lamp shades, window pane, chandeliers, curtains, picture panels and frames, Capiz shell balls, plates, decorative bowls, candle holders, tiles, flower vase, door hanging chime, soapdish, pendant, globelight, necklace decor, beads, bird cage, floor lamp holders, faux chandelier, gift boxes, collection item rack and many more. This alone is proof to the wonders of the captivating Capiz treasures. – Source
Capiz Shell Products
There are a great number of products that can be produced out of the humble capiz shell. Simply Google “capiz shell products” and see some of the many products that were made with them.