Great Black Cultured Opal Oval Cabochon 5x7mm (FIP) can Fire in Place with Metal Clay or Sand Cast in Place. These black opals differ from piece to piece. The base color varies from deep rich red, red-orange fire, green fluorescence, and deep green, and cobalt blue with various highlights emerging. The continuous play of color is fantastic.
5 mm x 7 mm cabochon size.
 
Price per opal.