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  • Home >> TipsNTricks >> GOLD Color – Why in some shops we see same carat gold in different sheds colors like yellowish, whitish

    GOLD Color – Why in some shops we see same carat gold in different sheds colors like yellowish, whitish


    Gold is yellow and copper is red, the only two colored pure metals. All other metals are white or grey in color. Adding copper to gold makes it redder and adding silver, zinc and any other metal makes gold paler. Thus, we can understand that lower carat golds, because we can add more alloying metals, can have a wider range of colors than the higher carat golds.

    The purity of gold in the jewelry is indicated by its karat number. 24 karat (24K or 24 kt) gold is as pure as gold for jewelry gets. 24K gold is also called fine gold and it is greater than 99.7% pure gold. Proof gold is even finer, with over 99.95% purity.

    Chemical composition of gold alloys with color and karat number

    Color of Gold Alloy Composition
    Yellow Gold (22 kt) Gold 91.67%, Silver 5%, Copper 2%, Zinc 1.33%
    Red Gold (18 kt) Gold 75%, Copper 25%
    Rose Gold (18 kt) Gold 75%, Copper 22.5%, Silver 2.75%
    Pink Gold (18 kt) Gold 75%, Copper 20%, Silver 5%
    White Gold (18 kt) Gold 75%, Platinum or Palladium 25%
    White Gold (18 kt) Gold 75%, Palladium 10%, Nickel 10%, Zink 5%
    Gray-White Gold (18 kt) Gold 75%, Iron 17%, Copper 8%
    Soft Green Gold (18 kt) Gold 75%, Silver 25%
    Light Green Gold (18 kt) Gold 75%, Copper 23%, Cadmium 2%
    Green Gold (18 kt) Gold 75%, Silver 20%, Copper 5%
    Deep Green Gold (18 kt) Gold 75%, Silver 15%, Copper 6%, Cadmium 4%
    Blue-White or Blue Gold (18 kt) Gold 75%, Iron 25%
    Purple Gold Gold 80%, Aluminium 20%

     

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