Marble "Mother-of-Pearl Tide” Glass. Collectible sphere. Diameter — 42 mm (1.65”)."Mother of Pearl Tide Collectible sphere Diameter 42 mm (1. 65) Inside are bright orange flowers and clear bubbles that create an underwater atmosphere. The contrasting purple turquoise details add depth and a touch of exotic character to the composition. The shape is formed entirely by hand in an open flame, without the use of a lathe or mechanical tools.