This lovely ring is from the 1950's and features a 1/2" long jade cabachon in a prong setting.  A pretty leaf motif curves around the sides of the cab making this a distinctive vintage setting.  The inside is marked with the initials "CNA" and "925" for sterling silver.  From Thailand, this ring is a size 7 1/2.  SORRY, THIS ITEM HAS ALREADY BEEN SOLD!

Front view: