Essentially a volcanic glass, Obsidian ranges in color from opaque black, to green, brown, mahogany, black with rainbow colors, black with snowflake patterns, black with a golden sheen, and translucent black (Apache Tears). As with all natural stones, colour and look may differ from strand to strand and even from bead to bead. Beads: Round 4mm - 40cm strand Round 6mm - 32 pieces Round 10mm - 19 pieces Chips 4mm-8mm - 90cm strand Pendant: Briolette (Flat) 30mm x 40mm - 1 piece