How do I tell if this vase is valuable?

I do not know anything about crystal, glass, etc. I do that this vase is 30+ years old. On the handle around the rim the design is 'pressed' to give it the detail, it is heavy, stands 7" tall, has just a few air bubbles in it and I see no seams on it. Is it worth anything, older than 30 years, any information would be appreciated. Thanks for looking.