This emerald shaped blue topaz commands attention! The pendant is set in 18K yellow gold on an 18" chain, accented with a delicate diamond design above helping to create the perfect statement piece! This gemstone has been hand selected for the purity of color and crystal clear appearance, giving you a luxuriously fun piece! Since the 2000's, blue topaz has become the 2nd most popular gemstone in the world! Naturally occurring blue topaz is quite rare, you'll find the vast majority is heat treated as is the case with this necklace. The treatment is permanent and stable within the gem and done in a fashion to comply with all industry standards.