The temperature has been so relentlessly hot this week that the government imposed a four-day mandatory holiday beginning Thursday and urged residents to stay out of the sun. At its most brutal, the so-called feels-like temperature has hit a staggering 159 degrees Fahrenheit, according to The Weather Channel.
12K Red gold: 50% gold and 50% copper. Up to 15% zinc can be added to copper-rich alloys to change their color to reddish yellow or dark yellow. During ancient times, due to impurities in the smelting process, gold frequently turned a reddish color.
The most common white metals that form the white gold alloy are nickel, palladium, platinum and manganese. Sometimes copper, zinc or silver are added. However, copper and silver form undesirable colored oxides in air or on the skin, so other metals are preferable. The purity of white gold is expressed in karats, the same as with yellow gold. The gold content is typically stamped into the metal (e.g., 10K, 18K).