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14K White 5.9x5.4 mm Youth Puffed Heart Earrings April 14K White Blue Sapphire Cuff14K White 5. 9x5. 4 mm Youth Puffed Heart Earrings Pure gold (fine gold) is softer than pure silver but harder than tin. Its beauty and luster are unmatched by any alloyed gold. The extreme malleability, ductility, and softness of pure gold make it practically useless for jewelry applications. Alloying elements (other metals) are added to gold to increase the toughness and hardness of the gold alloy. While almost any metal can be alloyed (melted) with