Thank you! I agree that the side stones look unstable. In fact, they are not. They are also diamonds. This was verified. What cut could they be? What, if not zircon could the center stone be? Interesting! Any ideas? The setting is platinum, so I assume it‘s not glass? It‘s at the jeweller at the moment for resizing - I wonder if he‘ll come back with any ideas.Obligatory not an expert, but from your picture
It doesn’t look like zircon, nor like French cut on the side stones. Them not being French cut is no big deal - but I’d think we see at least some tell tale zircon doubling in the facets?
And, again, from what I see in the picture the side stones look like they are barely held in. I see a prong on one of the four corners. I’d be more worried about that then your concern about breaking the zircon.
I’d guess more towards retro jewelry period, but late Art Deco as well.
The stone is def. not an aqua. So much I can tell. It does have the typical blue and when in sunlight almost greenish look of a zircon. That's why I thought it was one. I don't know much about topaz, but will check. The stone does have an inclusion. So I still think, no glass. Not best quality whatsoever. The jeweler always checks the setting as well. So that's good! Thank you!Anyone can take out an original stone to a plat mounting and put subs in. Nefarious or not.
Diamonds I would consider old mine cushions.
Can hazard a guess to the center as being any type of simulant /synthetic, to topaz or aqua?
Is your jeweler only resizing or are they rehabbing the prongs as well?