Featured Mexican Silver Jewelry - Opalescent Cabochons?, Age?

I don't know, some sites call it dragon's breath, and others call this dragon's breath:


The fact that some people call it 'opal' has come to the attention of the opal world. Here is an info page on it, including a photo of a genuine fire opal:
https://www.opalauctions.com/learn/did-you-know/dragons-breath-opal

 

I'm not seeing the veil in these, so not dragon's breath. Just harlequin opal glass.

 

Hi there, I just purchased a necklace very similar to yours and it is also 7.5 ounces with 925 stamped. I will try and post a picture. All I got was the necklace. I have been searching the web for information on the piece. Do you still have the piece? https://poshmark.com/listing/Stunni...-of-opals-and-silver-60b526d1f470e2182d2cd5c0

 

Yes. I do. I love it. Happy to hear you have one and for the link. I think this link may be for real opals, though

 

I think her "opals" are foiled art glass, typical for Mexican jewelry

 

Glass!