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14k 3.6mm Semi-Solid Round Box Chain 2.53g 14K White Aquamarine Bezel-Set Bar14k 3. 6mm Semi Solid Round Box Chain 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 gold, only