Set of 7 mother of pearl coasters with storage case

I am selling this set of drink coasters. There are 7 in the set, which fit perfectly into the case, so I don't think there is one missing. Each coaster has a unique design with seashell or mother of pearl inlays in strips and fragments. The inlays give each coaster a unique texture; though there is a lacquer finish on each coaster the surface is slightly bumpy. Colors range from pearly off-white to a light salmon pink. There are no markings for brand or manufacture, though some packing material indicates Chinese origin. The style is modern Asian. Dimensions: Coasters are 4" x 4" square and 4 mm thin. Case is 5" x 5" and 1 1/2" tall. In excellent preowned condition. Offers welcome!