Murano Glass ashtrays - V. Nason

Found these at a Savers on a thrift trip , they were hanging on a wall in a bag ; set of 4 glass ashtrays . They are Italian glass , made by Vincenzo Nason ; Murano 1967-2001. They are done in a black amethyst , red & copper spatter and are marked ITALY on the base . I wouldn't ruin the glass by putting a butt in it , I think they make great open salts for the table ; festive setting for the Holidays ahead. Each one is only 2 1/4" round , standing at 1 1/4" tall and about 1" deep .