Mother of Pearl round semi-precious stone beads. These 6mm gemstone beads are a white & cream colour, formed from the shell of oysters they are believed to have protective properties. Mother of Pearl is the birthstone for June. These gemstone beads are sold either singularly or strung on a 16 inch/40cm strand of monofilament which contains approximately 66 6mm beads. They are ideal for necklaces and earrings.