Is this Scottish agate? Carnelian? Victorian Edwardian? It is stamped 925 inside clasp saying MRF

I picked this up at a flea market in MASS. The stone swivels and it has a hole in the setting to let the light in. It is gold plated I believe but on the inside clasp it says "MRF" and then it is stamped 925. I have searched and searched and I don't know if it's a Carnelian ? Blood stone? Scottish Agate? The gold filigree is beautiful and has a floral abstract pattern in it. The stones completely flip around and the stones are flat with gold filigree on the bottom side. The lady said it was rare and antique and I have looked under spinning fobs like a pocket watch and I can't find it there either. I even asked my antique group and nobody knew either. Can anyone lead me in the right direction for this bracelet? Is it all sterling because it is stamped 925 on the back too? This is very frustrating!
Thank you all!
Diane