Beautiful agate gemstone drops range from approx 24mm (smallest) to 32mm (largest center triangle). Set of five includes 2 small, 2 medium, and 1 large triangle. Agate is routinely heat-treated and dyed, so it is likely these beads have been color enhanced.
Sold per strand of 5 focal beads, with spacers added to prevent chipping. Additional photo shows multiple sets to demonstrate variation.