Brownlip heishi 4-5mm. Heishi literally means shells that are cut into tiny pieces drilled, strung and shaped then strung into necklaces. Brownlip shell is a specie of sea snails. Also called rock snails. It has dark brown spots in different shapes and forms with light to tan shade. The inside of the shell when cleaned and buffered has a more uniform coloring than the outside face of the shell.