A sweet set of lever back Silver Russian earrings
The 10mm black bead tests as glass .
These have Russian hallmarks maker unknown see picture.
Total weight 6.7 grams.
The hallmarks are 6C backwards N upside down V  and then C ladies head 925
Google thinks: The earrings are beautifully preserved 925 Sterling Silver, assayed in Saint Petersburg, Russia, around 2006.