Women's prayer beads, sapphire, 8mm beads, limited edition, bWe have rosary beads made of the gemstone sapphire Sapphire is a mineral called corundum, just like ruby. Corundum is the second hardest stone after diamond. Corundum does not only have beautiful colors that can be used as gemstones. There is also black irregular corundum. This irregular corundum was once used as road paint. (It has now been replaced by synthetic corundum.) As for the names ruby and sapphire, The bright red ones are called rubies, and