Prehnite and Matrix Pear Briolettes have a vitreous luster with an excellent cut - polish - shape for a nicely made and well matched set. The bicolor beads are translucent Prehnite of a medium green hue and an opaque, dark brown Iron Ore matrix. Beautifully shaped elongated faceted pear beads with a slightly metallic Ore luster and a vitreous Prehnite luster.