Vintage 925 Sterling Silver Imagine Band Ring With Bezel Set Stone

Vintage sterling silver wide band ring. Classic and sleek Mid-Century Modern style. Stamped Imagine on the inside. Also marked 925 and has a sign indicating a precious stone. Solid and heavy, almost 7 grams. Not sure what kind of stone it is. Could be a sapphire. I don't think it's a diamond. Size 5.75, but due to being wide, may better fit sizes 5.25-5.5.