Prehnite Plain Rondelles measure approximately 6.5mm graduating up to 12mm in diameter, beads exhibit a glass like luster, the gemstones have excellent polish creating a symmetrical shape, these Prehnite beads are matched on strand for quality and color, gems are a strongly greenish yellowish hue in a light saturation, and the beads show a transparent Prehnite with wonderful graduation in diameter, and these gemstones have internal crystal structures reflecting light to create a soft glow within these stunning Prehnite beads.