Featured Date of Czech garnet flat top glass brooch

I’ve tried to do my research on this brooch but could do with some expert help to date it please.
This brooch has flat top glass gems. I’ve looked at plenty online and most are described as Georgian but this isn’t as it has an open back.
So then Victorian? But it’s got a short thin pin so unlikely.
So Edwardian? The pin and setting is thin and cheap looking more like 30s….but…..I can’t find any glass garnet flat top brooches to compare from that era they are all earlier. Hmmm, any ideas please? Thanks for any thoughts
Apologies it’s dirty, those prongs resist a quick rub over with a cloth so I’ll have to take my time with it.

 

JMHO, with that hinge I would say early 20th century. You tested them to confirm they are garnets?

 

No, I assumed glass but I should have tested them to be sure. I’ll do it in the morning

 

Mary may have a surprise for you, but make sure to clean the stones before testing

 

Will do she is quite reliable at garnets when she works. Her newest game is only working if my feet are off the floor (yes really). Maybe it’s me that is the problem, I’m too magnetic or too earthed or something

 

It's a very cool and unusual piece. My thoughts were early 20th century or older even. Do let us know what the test says. I'm voting for garnets!

 

I think you really are increasingly becoming a force to be reckoned with

 

Anyone here who has had an interest in jewellery has been mightily enlightened by a certain wonderful lady, who we all hold dear

 

Sometimes pieces like this have mixed glass and natural stones, so I'd test them all.

 

Bohemian garnet pieces are indeed often mixed with glass. That looks right for 1910s into 20s to me.

I'd ultrasound that carefully.

 

Great brooch, K. I would certainly let Mary do her job.
As evelyb and obb said, many garnet pieces are a mix of genuine garnets and garnet glass, which was also made in Bohemia.

The back is unusual for Bohemian made. Bohemian garnet jewellery backs are generally closed and flat for 19th century pieces, and closed with small holes behind the garnets for post-1900 (possibly a few years earlier) pieces.
So I wonder if it was made somewhere else, using imported Bohemian garnets and/or garnet glass. (UK?)

Those flat round hinges were first used in the 1890s, but this beauty could certainly be early 20th century, given the length of the pin.
Because I don't know this specific interesting mix of settings for garnet jewellery I can't be more exact, but is antique, imo.

 

That's a thought on the import idea.

Did you know garnets are found in the thousands on the Thames foreshore?

https://www.beachcombingmagazine.com/blogs/news/mudlarking-the-mystery-of-the-thames-garnets

https://www.bbc.co.uk/programmes/ar...items-that-tell-the-story-of-the-river-thames

 

Connecticut is filthy with them too, but not gem grade.