Vintage Mid Century art glass ashtray heavy gold white cased glass

This beautiful mid century art glass ashtray looks and feels like Murano but has no markings. It is 5 1/2'' across and 2'' tall. It is heavy, weighing 2 lbs. 10 oz. It is white glass with a glittery gold center cased in clear glass. It is an ashtray but would make a lovely trinket dish or bowl. There are no chips or cracks.