Cushion cut Green Tourmaline ( 12 x 9mm) with diamonds in 'X' design. 18K Yellow and white gold.
 
 
Designer: Tiffany & Co. 
Weight: 14.8 grams 
Width: 11.6 mm widest point 
Size: 5.25
Main Stone: Tourmaline/Diamond 
Diamond Weight: (18) 0.18 CTTW
Metal Purity: 18K Gold 
Hallmarks: TIFFANY & CO. 750 2000
Era: 2000
Condition: Preowned