Gemstone, green aventurine, natural, guru or prayer beads - 10x10 mm T-drilled round bead & tower bead - Mohs' hardness 6.5-7.0 – one unit has 1 set or 2 pieces
Gemstone, natural impression jasper, emerald green dyed, 10x10 mm, round beads – A-grade, Mohs' hardness 3.5-4.0 - one unit is +/- 20 cm and has +/- 19 beads
Gemstone, natural volcanic or lava rock, deep green-blue dyed, 10x10 mm, round beads – Mohs' hardness 3-3.5 - one unit is +/- 19 cm and has +/- 19 beads