Included in this lot is a signed Navajo Native American Wilbert Grey blue fire opal and sterling silver ring. This opal ring features a mosaic inlay of cut blue fire opal divided by a sterling silver border. This ring has a solid sterling band with hand engraved lines. The fire opal shows a spectacular play of blue-green color with flashes of purple throughout. The piece is unstamped but comes from a collection of Navajo artist Wilbert Grey. The ring measures a US size 10 ¼. Retail MSRP on a piece like this is over $400.