6x5x3-13x5x3mm Australian Opal center drilled Natural Crystal Chip Beads 7.5 inch 64 beads

Australian Opal Natural Crystal Chips have a dull & waxy luster showing visible matrix in their varied hues of beige, off white, brown, and sand exhibiting scattered play of color within the strand of opaque Opal beads which are chip faceted and center drilled. Bead measurements vary per strand but the average size seems to be in the range of 6x5x3mm up to 13x5x3mm.