Pile of Malampaya Sound capiz shells, the outer shell of the Windowpane oyster (Placuna placenta) found in the shallow coastal waters of the Philippines. The shells are flat and semi-transparent with pearlescent hues, often used to create lampshades or other luminescent objects. North Palawan, Philippines, May 2009 . NOT AVAILABLE FOR MAGAZINE USE IN GERMAN-SPEAKING COUNTRIES UNTIL 1ST JULY 2013.