Mid Century Modern Ice Block Ashtray

One of a kind (might be sweden glass) ice block ash tray (solid and kind of heavy) Great condition, previously used Does have a crack within the glass (tried to show in photos, not sure how it got there, was passed down to me in this condition. No chips or cracks on the outside, contains few little air bubbles (as seen in photos). No discoloration, no stains. Measurements and weight shown in photos**