The purplish tint to the glass would indicate an early weight - 1930s - and probably a trial to test a new type of ground. Whole canes, partial canes and aventurine inclusions are set on a white ground - that didn’t quite work! It has the appearance of plaster of Paris, is slightly off-white, and the textured surface has black spots on it. There were also compatability problems...such as the minor annealing crack at 10 o'clock in the base image. It can’t be felt but radiates out ca. 2cm from the rough pontil in the fire-polished base. Otherwise it's an interesting weight with a high dome; no chips, scuffs or abrasions.
