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.
Yellow, green and red golds are produced by alloying gold with copper and silver in different proportions. The gold content of jewellery is expressed as a number of carats-pure gold is said to be 24 carat gold; 18 carat gold contains 18/24 or 75% pure gold.ellow, green and red golds are produced by alloying gold with copper and silver in different proportions. The gold content of jewellery is expressed as a number of carats-pure gold is said to be 24 carat gold; 18 carat gold contains 18/24 or 75% pure gold.