Decorative Clamshell Art Glass Centerpiece Dish

Decorative art glass dish, possibly vintage, apparently unsigned. Dish resembles half of a clam shell and is colored in metallic teal tones. A rough grid like pattern produces detailing. Measures approx 12 inches In diameter. Wear is consistent with age. Clam shell, mollusk, sea life, ocean themed, nautical, maritime, art glass, studio glass, hand blown, hand painted, centerpiece, decorative dish, decorative glass, decorative tray. 9