Jeweled brooch - from a colonial site. Age?

[Scrappy]

I can speculate like many people, but I was hoping to get a couple members with jewelry knowledge to help me date this brooch based on similar styles/examples. It's from a site that has a date range of 1770-1900. It's silver plated and still in process if being cleaned .

Any help is appreciated.

 

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[DCMatt]

Need to see the back but I would guess art deco era based on the style.

DCMatt