This auction is for a pair of Vintage Mid Century 925 Sterling Silver Emerald Green Spinel Cufflinks.  These are gorgeous big stones.  They are marked sterling, but they appear to be gold tones, so they could be plated, I'm not sure.  The color is a deep emerald or christmas green.  They measure about 1" tall by 3/4" wide.  The stones have sort of an offset faceted pyramid design.  The stones are in very good condition.