Check the listing for details. Rainbow Obsidian Smooth Round Beads 4mm 6mm 8mm 10mm 12mm 15.5" Strand. Condition: New. Listed at 6.49 USD. Material: (Not Treated or Dyed) Natural Rainbow Obsidian Shape: Smooth Polished Round Color: Black with Rainbow Shades Size: 4mm Approx 98 Beads Per Strand, With 0.8mm Hole 6mm Approx 65 Beads Per Strand, With 1.0mm Hole 8mm Approx 48 Beads Per Strand, With 1.0mm Hole 10mm Approx 38 Beads Per Strand, With 1.0mm Hole 12mm Approx 32 Beads Per Strand, With 1.0mm Hole The Rainbow Obsidian Mined in China Note: -Gemstone bead sizes are approximate and may have a +/- 0.5mm difference. -Gemstone bead drill hole sizes are approximate and may have a +/- 0.2mm difference. Spend More! Save More! 10% Off When You Spend Over $50 15% Off When You Spend Over $100 20% Off When You Spend Over $200 stone loose polished strand beads precious gemstone jewerly making