6mm wide, tungsten carbide ring (Comfort fit) with inlay of blue and slight green flash precious opal. A truly unique ring that is only available from BC Marketplace. The tungsten carbide ring has inlays of precious opal that show a play of colors from blue to green with a hint of yellow. Man Made Precious opal is made in Japan by Kyocera and many people say its beauty matches the beauty of natural fire opal. Precious opal shows fire in different ways when viewed in different lighting and when viewed from different directions. If you have never seen precious opal in person you are in for a treat. Brand: Almost forever Jewelry Design: Birthstone & Zodiac Style: Invisible-Set Occasion: Anniversary Resizable: No Size/Dimensions: 5.5 Gift Box: Gift Bag Shape: Rectangular