This is a glass invented by Flavio Poli in the early 50's at the firm of Seguso Vetri d'Arte .
The procedure for its preparation is as follows: a large concentric-ring murrina is made with two alternating colours.

This is then heated again and applied while hot to the item being processed. After a first finishing step and after cooling, the item, still having an irregular shape, is modelled and polished at the grinding wheel: this is an extremely long and delicate operation.
Due to the complex and laborious technique, a limited number of very rare and refined items were crafted.