Rainbow of Colors for Gold
Here's an important fact to know about the gold used in fine jewelry. Gold doesn't have to be yellow. "Real" gold comes in myriad colors. By mixing other metals to yellow gold in varying percentages and combinations, jewelers can create a rainbow of colored gold alloys. In the case of black gold, a number of scientific processes are used to create this unusual variation. White Gold - Nickel and palladium are added to yellow gold to produce a white (or gray) color. Rose/Pink Gold - Copper is added to yellow gold to produce a reddish tint. Green Gold - Silver is added to yellow gold to produce a green shade. Purple Gold - Aluminum is added to yellow gold to achieve a violet tint. Blue Gold - Indium is added to yellow gold to produce a blue color. Black Gold - Black gold is created through a number of chemical processes. (Editor's note: Put on your science cap, because this gets a little complicated.) Among the techniques used are electroplating with rhodi...
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