Hi George,

Thank you for contacting Mearto with your appraisal inquiry.

Lorenzo Radi (1803-1874) was a pivotal figure in the history of Murano glassmaking, active during the 19th century. Known for his innovative contributions, Radi played a significant role in reviving the ancient techniques of Murano glass that had begun to fade over time. His works are best known for their use of chalcedony, as exemplified in this bottle vase. He also revived the aventurine glassmaking technique, which involves embedding metallic particles (typically copper) in the glass, creating a sparkling, glittering effect and are what I think you are seeing in the gold bubbles.

It's worth noting that Lorenzo Radi's son, also Lorenzo (1853-1928) also specialized in chalcedony and mosaic glass but I think this is the work of the father rather than the son.

When the senior Lorenzo Radi's works come to auction, they typically sell between € 2,500-4,500 and I would expect this to perform similarly if auctioned in a sale that featured more pieces of Murano glass.

Based on the photos and information provided, and subject to examination, this is:

An antique Murano chalcedony and aventurine bottle vase
made by Lorenzo Radi (1803-1874), Murano, Venice, Italy, mid 19th Century
Of circular and triangular section and baluster shape with flattened lip and indented body, made of brightly colored chalcedony (a silica-based mineral comparable in chemical structure to quartz) with aventurine (another type of quartz with light-reflecting minerals) inclusions. Signed RADI on the lip.
21.5 cm (8-1/2 inches) high
CONDITION: This bottle base appears to be in very good condition commensurate to age and use.
PROVENANCE: Acquired from an online auction
€ 2,500-4,500*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, or questions/concerns, and thank you again for using Mearto.
~ Delia