BEAUTIFUL CHECKERBOARD CUT NATURAL GREEN PERIDOT.  1.10CT. 8MM TRILLION STONES.  6-7 ON THE HARDNESS SCALE . THIS IS THE BIRTHSTONE FOR AUGUST.  I HAVE LISTED 1 9MM ROUND MATCHING STONE ON MY WEBSITE IF YOU ARE LOOKING TO MAKE A SET.  NEVER CLEAN PERIDOT WITH STEAM OR ULTRASONICS.  YOU MAY BUY ONE STONE OR BOTH.