Vintage Questions: Can You Help Identify this Brooch? celluloid? bakelite?

We love helping out our readers and our Vintage Pulse
community members, but often times we don't have the answers. We were
hoping YOU  could help! Feel free to join in and answer if you can, we
know they will be appreciated!

Vintage Indie Reader Mary Ann writes " I purchased this brooch with a late 1800s, early 1900s
grouping from an upstate New York estate. Most of the items in the grouping
belonged to James Snyder, who was a prominent figure during that time, and
commander of the Grand Army of the Republic of 1905.

I did not receive any specific details about the items included. 
Two people have told me this is antique celluloid. I researched online and
could not find anything similar to this design…it’s really unique.

Does anyone recognize who the maker might be…or anything
else about it?

It has a crescent of inset original rhinestones, and came
with the jump rings in the bottom, all original. I added the Swarovski crystal
beads and that is the only altering I did…any info shared will be greatly
appreciated."

(Have something you need help with? Email us Subject: Help Identify in the subject along with any history and photos are a must.)