... 3.Suitable for necklace and other accessories 4.Weight:about108g/string We produce more than 100 kinds of gemstone beads including ... , quartz,black stone,obsidian,crystal,jet etc. Our design includes round, tumble,star,CAB,rud disk, teardrop,tube, faceted or not ... expansion of trade to our mutual benefit.Factory Office 12mm round black stone gemstone loose bead