Vintage Blue Banded Calcite "Onyx" and Brass Ashtray

A gorgeous piece of blue banded calcite ("onyx"), polished and carved into a vintage ashtray with brass trim and cigarette rests. Really stunning piece of stone, with lovely semitransparency revealling a depth of colors and shapes within. The piece almost resembles the milky way in the sky. There is a slight amount of surface metal corrosion. Please see photos. 

4 x 4 x 3/4" (The cigarette rests extend an additional 3/8" making the total width 4 3/4")