Prehnite Ring 01 Genuine Green Black Rutile Oval Stone Big Metal Adjustable (Gift Box) Measures: Adjustable 6-13 (1.4"H, 20x14mm stone) Chakra Balancing: Heart Chakras Stone Properties: Prehnite is a crystal used to heal the healer. One-of-Kind: Natural Prehnite is set in your new crystal healing ring. This is a translucent light green stone with black mineral threads, polished into an oval cabochon and set into a metal ring. The ring is 1.4" high and hand designed with copper, gold and silver plated metals. Your new Prehnite ring is adjustable from size 6 to 13 for both men and women. Includes: Gift box when purchased from I Dig Crystals.