Rainbow Moonstone Button Beads 15" Strand. Absolutely lovely button beads, beautiful quality and flashings of blue. Around 5mm in size.

Rainbow moonstone is a feldspar mineral, a transparent labradorite with a pearly, opalescent Schiller (a variety of iriscent colours). Although not actually moonstone, it's similar enough that it is accepted by the gemstone trade as a gem in its own right.