You’ll receive the exact cabochon listed 
Mexican lace hyalite opal is a rare, colorless to milky or golden-coloured variety of hyalite opal from Mexico known for its bright, UV-reactive neon green fluorescence under ultraviolet light, which is caused by trace amounts of uranium. It lacks the typical opalescence of precious opal, but is highly sought after by collectors for its unique glow, sometimes found with inclusions or on a matrix with other minerals like Mexican lace agate.