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		Historic emerald necklaces command huge returnsImage Gallery (3 Images)
					
						 
 
	
							A remarkable 275-year-old emerald necklace has shattered its presale estimate at auction in New York. | Source: Christie's
						
 
					
						 
 
	
							A Mughal carved emerald necklace
						
 
					
						 
 
	
							A multi-gemstone and emerald necklace.
						
 
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