Prehnite Tear Drop Briolette measure approximately 12x8mm up to 18x9mm, exhibit a glass-like luster, the stones have an excellent make, a symmetrical shape, are matched on strand for quality, gems are a medium greenish yellow hue for Prehnite, the transparent Prehnite have visible internal characteristics, and gems refract light creating a soft glow within these Prehnite gemstones.