Mother's or grandmother's bracelet

This is broken. There are two strings, it may have been a necklace originally but now one them is bracelet size. This has always been my favorite. It is shiny and the stones look like great big diamonds, but are crystal. Again, I am interested in seeing what it may have looked like in its original form and how old it is--what time period was it popular? I think it was my grandmother's which means it was purchased before 1912.