4x4 mm, round, gemstone beads, sponge quartz, Sinbad blue

Gemstone, natural sponge quartz, sinbad blue dyed, 10x10 mm, round beads - Mohs' hardness 7.0 - one unit is +/- 19 cm and has +/- 19 beads

Gemstone, natural sponge quartz, sinbad blue dyed, 5x8 mm, rondelle beads - faceted - Mohs' hardness 7.0 - one unit is +/- 19 cm and has +/- 39 beads

Gemstone, natural sponge quartz, sinbad blue dyed, 6x6 mm, round beads - Mohs' hardness 7.0 - one unit is +/- 19 cm and has +/- 32 beads

Gemstone, natural sponge quartz, sinbad blue dyed, 8x8 mm, round beads - Mohs' hardness 7.0 - one unit is +/- 19 cm and has +/- 23 beads