Connie, your question about a definition of Opaline got me to pondering. Its one of those words I think now used without much thought and on my part guilty I am afraid. Ivo in his book Glass Fact File a-z gives a wonderful definition. Opaline is a type of glass, semitransparent. He also states similar to Bristol glass. There is more and I urge anyone who needs to know to get the book. Wonderful!!!!
To keep this short (too late I know) lets say Opaline is a type of glass.
On my part, I feel like striking the word Opaline from my description until I learn more. Instead let us say a 14 inch Translucent green glass vase.
Ruth I am glad you like it and if I had to use one word as a description, it would be "Stately"
David, good question but not sure there is an easy answer as to why they used uranium. And not just in old glass, I have an iittala votive candle holder in blue, brand new that glows a soft yellow under blacklight. Terry