Gemstone, Dalmatian jasper or Dalmatian stone, Mexico, natural, 10x10 mm, round beads – faceted – Mohs' hardness 6.5-7.0 - one unit is +/- 19 cm and has +/- 19 beads
Gemstone, Mookaite Windalia Radiolarite, natural, 10x10 mm, round beads - A-grade, Mohs' hardness 5 6.5-7.0 - one unit is +/- 19 cm and has +/- 19 beads
Gemstone, Mookaite Windalia Radiolarite, natural, 12x12 mm, round beads - A-grade, Mohs' hardness 5 6.5-7.0 - one unit is +/- 19 cm and has +/- 16 beads