Gemstone, Dalmatian jasper or Dalmatian stone, Mexico, natural, 8x8 mm, round beads – faceted – Mohs' hardness 6.5-7.0 - one unit is +/- 19 cm and has +/- 23 beads
Gemstone, druzy agate (agate with tiny crystals), silver grey, 8x8 mm, round beads – metalized, frosted – Mohs' hardness 6.5-7.0 - one unit is +/- 19 cm and has +/- 22 beads
Gemstone, natural volcanic or lava rock, waxed and dyed black, 8x8 mm, round beads – Mohs' hardness 3-3.5 - one strand is +/- 19 cm and has +/- 23 beads