abstract blue bright close closeup coaster color colors colour coloured colours green macro paint painted plaster purple red sea seashell shapes shell shells UP white background beach broken clam cockle-shell debris decease fragments marine mud flat mussel mussle ornaments part pieces sand sediments shard shards smithereens stones texture abundance backgrounds bivalve damp edge edges forthy froth mollusc mollusk plentiful scallop seashells seashore shore Sizes smooth sunlight surface surfaced surfaces textured textures types variety wet wet-sand cream dip Dirt dust dusty pearly pitted ridge ridges rim rough sharp spiral spiraling spiralling turban shell turns twists classifications