Prehnite plain nuggets measure approximately 8x6mm to 13x10mm in size, exhibit a glass-like luster, the stones have good polish with an asymmetrical nugget shape, Prehnite beads are matched on strand for quality and color, gems are a medium yellowish green hue, and the transparent Prehnite have visible internal characteristics that resemble seaweed in color and shape, and these Prehnite beads refract light creating luminescence within the stone.