I got this wooden bookmark in Davao City. This is hand painted by a well-known tribe in the South (which usually refers to Mindanao) called Maranao. I'm, personally, quite familiar with this group since I'm also from Mindanao, only in the Northern part. This bookmark has a metal clam-like ornament, which clings when moved.
Maranao is the term used for the people of Lanao, a predominantly Muslim region in the Philippine island of Mindanao. They are famous for their artwork, sophisticated weaving, wood and metal craft, and their epic literature. The word Maranao, also spelled Maranaw, means "People of the Lake", referring to the indigenous people who inhabited the lands around Lake Lanao whose principal town is Marawi City. The Maranaos are part of the wider Moro ethnic group, who constitute the sixth largest Filipino ethnic group.