Gemstone, druzy agate (agate with tiny crystals), silver grey, 10x10 mm, round beads – metalized, frosted – Mohs' hardness 6.5-7.0 - one unit is +/- 19 cm and has +/- 18 beads
Gemstone, natural volcanic or lava rock, warm black grey dyed, 10x10 mm, round beads – Mohs' hardness 3-3.5 - one unit is +/- 19 cm and has +/- 19 beads
Gemstone, natural Malaysian jade or chalcedony, black dyed, 10x10 mm, round beads - translucent - Mohs' hardness 6.0-7.0 - one unit is +/- 19 cm and has +/- 19 beads