Gold charms for bracelets are great gifts. The chemical symbol for gold is Au. It comes from the Latin word aurum which stands for gold, and this precious metal has been used in coins, jewelry, and other arts ever since man started writing history. Gold is found in nature as nuggets or grains in rocks, alluvial deposits and veins. The metal is dense, soft, and shiny. It is the most malleable and ductile pure metal known to man, the color of pure gold is bright yellow color.
Gold symbolizes wealth and has been used as the basis for currency policies of governments all over the world. Gold jewelry are not the only items where gold is used, it also has industrial uses such as in dentistry and electronics. Unlike silver used in silver rings and other base metals, gold is not soluble in nitric acid which is used in testing gold and other metals. The term “acid test” is a colloquial term that refers to testing anything for authenticity and it comes from the nitric acid test used in proving the authenticity of gold.
Pure gold or 24K gold is too soft to use in jewelry and to make it stronger and more durable, pure gold is alloyed with other base metals. Lower carat gold comes in 22k, 18k, 14k or 10k, the lower the caratage, the higher percentages of copper, or other base metals or silver or palladium there are in the alloy.
Copper is the most commonly used base metal in gold alloys, this gives the gold alloy a redder and deeper shade. You can find this in antique Russian jewelry as they are made of eighteen-carat gold which contains 25% copper. Antique Russian pieces have that characteristic, unique copper hue. White gold is quite popular these days, this is an alloy made from palladium or nickel. White 18-carat gold combines 17.3% nickel, 5.5% zinc, and 2.2% copper.