For your consideration is a beautiful vintage ring.  I believe the main stone is jade and the small black stones are Marcasite.  It is marked 925 Sterling Silver and the Designer KJC.  It is a size 8.  

I have recently acquired a very large estate.  There were many jewelry and collectible pieces.  I will be listing many more items in the next several months as I dig thru all the pieces.  Thanks for looking.  Check my other listings for more jewelry, vintage, antiques, collectibles, clothing, fabrics and holiday items.