Determine kind of jewelry
Some more observations that didn't fit into a comment:


The stones are certainly no precious stones. The color indicates glass stones. If you're willing, you could try scratching the surface in an unobtrusive place like the edge where they're connected to the metal. If you can chip or scratch them with a nail or other sharp object, they are glass stones.
The shade of the metal could indicate silver, but the dark and consistent shadows in all the recesses could mean it's a non-precious metal that was dipped into a color wash to make it look like silver. You can clearly see the color in the areas of the leftmost cross.
All silver (or gold) objects should have a "Hallmark" at the backside, which is a special punch denoting the content of precious metals. If there is no hallmark anywhere on the piece, it is not silver or any precious metal.
If this were a high value artisan work, these hallmarks would be on each of the pendants as well. There would also be special hallmarks indicating the artist.


Example of english silver hallmarks:



All things considered it doesn't give the impression of having any material value. Far more interesting would be the symbolic value, but unfortunately I cannot help you with that. It could be that each of the pendants has a certain meaning that, combined with the other symbols and the place where it was made, could tell a story, commemorate an event, show the association with a certain society or symbolize wishes for the bearer's life.