Featured Old pins/brooches, would like help confirming age please.

I have been accumulating and researching these for a while. I think I have figured out dates but would love some opinions from the experts. Thank you for any help or advice as always.

First group I think is the oldest bunch and includes:
Garnet studded, with a safety clasp that opens from the top so 1900ish? Bohemian?
Flower shape one, which looks black in picture but is really a dark wine color. Pin extends beyond body so Victorian?
MOP horseshoe shape, Victorian? It came with a tag that said 1890's lace pin. It is upside down in the Picture.
Black one with pearls, Victorian mourning pin? It is missing its C clasp.







Second group: All have C-Clasps so 1900-1910? All stones test as glass. Top one I think is guilloche.





Third group: 1930's? All have roll over clasps.





And finally, this one: stone is glass, setting is brass, C-Clasp. Almost 3 inches wide. I am on the fence with it. 1900's or 1930's? Needs a vinegar bath I think.

 

Oh, such cuties! Love them all!
And will be waiting to see what the experts say about dating.

 

@Ownedbybear
@Any Jewelry
@kyratango
And anyone else. Can you advise?

 

They're ALL so sweet!!!

 

Thanks @Aquitaine and @IvaPan. I think they are nice as well. I want to list them but don't want to get the dating wrong.

 

The garnets look Bohemian and yes, late nineteenth into early twentieth. Probably silver. That dark red flower may also be garnet a bit later, 1910s. The Pearl is classic Victorian too. Those novelty mop brooches I tend to think are twenties, I’ve had some with Mother on them.

Yes on guilloche. The two little ones look as though they’ve Persian turquoise. That group looks early twentieth. I think your thirties ones might be slightly earlier, twenties.

Vinegar one is early twentieth imo.

 

And the others you've tagged are SO MUCH BETTER at dating your items than I am, as I inherited most of what I have......or had!!

 

Thanks so much @Ownedbybear. That information helps so much. I appreciate your help.

 

You’re most welcome, that’s a nice haul.

 

Agree with the dating
The top one in your second group is French Bressans enamels!
https://www.collectorsweekly.com/stories/122616-rare-early-19th-c-french-bressan-enamel

 

@kyratango thank you! I never heard of those enamels. I thought it was guilloche. I learn something new every time I come on here.