Gemstone, black ocean jasper or black orbicular quartz, natural, 8x8 mm, round beads - Mohs' hardness 6.5-7.0 - one unit is +/- 19 cm and has +/- 23 beads
Gemstone, black onyx, 8x8 mm, round beads – frosted, shiny polygon design – A-grade, Mohs' hardness 6.0-7.0 - one unit is +/- 19 cm and has +/- 23 beads