Big, chunky and hard-to-get Chrysoprase nuggets. These are, of course, natural stones and accordingly there are natural markings in them found in this stone. You can see them clearly in the photo. The nuggets are the most stunning pale green shade- my personal favourite for Chrysoprase.
Beads measure 15x9mm to 21x16mm approximately, however, there is variation between strands. Strands with bigger beads have around 19 beads. Strands with smaller beads (10x7mm to 19x15mm) have around 24 beads on a strand.