Rounds: Charoite 10mm 15 - 16 inches, per strand

Temporarily strung (claspless). About 35 beads on a 10mm strand. Especially for you chemists and geologists it is: (K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2O