I thought I recently read a posting that mentioned a shop in either Venice or Murano that sold glass sea shells. Now I can't find that information. If someone can help me out, I would be very appreciative. During my last visit to Venice I browsed through dozens of shops looking for just that item with no luck. Thanks!

found this online. It's a shop in washington state that imports from Venice..

http://www.atouchofvenice.com/glass.html

Seguso Viro in Piazza San Marco has beautiful glass shells. I was there in August 2005 and bought 2. They ranged from around 100-300 Euro.
I had seen photos of them in last May's issue of Bon Appetit.

there's a tiny shop in the calle that rund between San Polo & San Aponal that has sea-shells, coral and tiny glass vegetables. I'm afraid I can't remember it's name, but it's on the righthand side going towards San Aponal.

The store that Sandi posted the website for is only 20 miles north of Seattle. We used to live in that little town and seeing that website made me miss it even more! Sorry, I don't have anything else to add to help here...but thanks Sandi

On our last trip that is exactly what I was looking for as well, and found some beautiful ones on Murano. Here is an excerpt from my trip report regarding such.

"We basically strolled up and down the main canal taking a look in various glass shops. I was specifically looking for seashells, since my household theme is tropical. And, I found EXACTLY what I was looking for at Domus Vetri D'Arte on Fondamenta Vetrai. The shells were so colorful and intricate, and I even bought some sea coral and starfish, as well. They were all just beautiful and were carefully wrapped for our travels home."