8x8 mm, round, gemstone beads, common opal, yellow, natural

Gemstone, brown common opal, natural, South Africa, 8x8 mm, round beads - Mohs' hardness 5.5-6.0 - one unit is +/- 19 cm and has +/- 23 beads

Gemstone, green and brown (from light chocolate to hazelnut brown) common opal, natural, South Africa, 8x8 mm, round beads - Mohs' hardness 5.5-6.0 - one unit is +/- 19 cm and has +/- 23 beads

Gemstone, green common opal, natural, South Africa, 8x8 mm, round beads - Mohs' hardness 5.5 - one unit is +/- 19 cm and has +/- 23 beads

Gemstone, honey opal, common opal, natural, 8x8 mm, round beads - Mohs' hardness 5.5-6.0 - one unit is +/- 19 cm and has +/- 23 beads