Vintage sterling silver double selling sided pendant with Unakite and Jet on a twisted sterling silver chain

Absolutely mesmerising vintage sterling silver pendant - a floral design and silver band, encasing a beautiful stone I believe is a Unakite, or dragons blood jasper (I could be wrong here) and on the other side a highly polished jet black stone - stamped 925, leopards head, and either NE or NB - on a sterling silver twisted 18 inch chain