My mother-in-law recently gave me an opal ring that has been in her family for a long time. I asked about it's origin and history, but she doesn't know how old it is, or much about it. I think it's quite unique and pretty, and I'd love to know more. Could anyone here tell me anything about the ring from the below pictures? Approximate age? Style? I know that the stones are all opals and the gold is an alloy that is close to rose gold, but not exact. Thanks for looking!