I'm going to say "no" because I honestly don't know. I'm clearing out my aunt's estate and haven't taken her jewelry to be appraised due to the fee. So my ignorance could be your good fortune.
Not that I can see. I'm going to say that it is costume because I haven't taken the jewelry that I'm listing due to the cost of appraisals. I'm clearing out my aunt's estate and she had lots of beautiful pieces. The opal and ruby do look real.