here are no alternative ways. Being that they are not just essential , but a symbol in great demand, they are proposed exclusively in pearl . In the highest quality, Australia white, of 4mm, to enhence tthe shirt sluves and make then more elegant.
scientific name: pictada margaritifera.One of the most precious shells, flat but very thick, its whiteness has external parts in yellow. It is spread in almost all of the Indo-pacific area and in particular in the Philippines, Indonesia and Australia. It lives attached to the sea-bed and the coral barriers of waters not very deep (from 5 to 30 metres).