This vintage piece is an amethyst carnival glass bowl in a classic blackberry pattern, likely manufactured by early 20th-century companies like Fenton Art Glass Company or Northwood. 1919-20’s. Key CharacteristicsIridescent Finish: The surface features a striking metallic sheen with shifts of purple, pink, and gold luster, typical of classic carnival glass. Blackberry Motif: The interior of the bowl displays relief patterns of blackberry clusters, delicate blossoms, and detailed foliage. Shaping: It features a wide ruffled or crimped edge and is elevated by a sturdy, three-footed base.