This is a coaster of mother of Pearl.

Mother of Pearl is obtained in the South Pacific from the skins of large shells, so from the same material from which the shells form their beads. Apart from its fascinating iridescent glory, mother of Pearl as a material for the production of spoons of advantage is because it is tasteless in contact with eggs or caviar and no egg or caviar stick remains. In addition always again pleasantly is dealing with the cool, heavy material.

This coaster has a round shape. The diameter is 9.8 cm and it is 0.5 cm thick.

1 cm = 0.383 inches, 1 inch = 2.54 cm