Gemstone, spiderweb jasper or black veined jasper, natural, 12x12 mm, round beads - Mohs' hardness 6,5-7.0 - one unit is +/- 19 cm and has +/- 16 beads
Gemstone, African bloodstone (also called Seftonite or vulcan jasper), natural, 4x4 mm, round beads – Mohs' hardness 6.5-7.0 - one unit is +/- 19 cm and has +/- 44 beads