![]() However, electrum was used even thousands of years before that, by both the Akkadians and Ancient Egyptians (as evidenced by the Royal Cemetery at Ur). ![]() Green gold was known to the ancient Persians as long ago as 860 BC under the name electrum, a naturally occurring alloy of silver and gold. ![]() This is why many Greco-Roman texts, and even many texts from the Middle Ages, describe gold as "red". An alloy with only gold and silver is the hardest at 15.5 K (64.5% gold and 35.5% silver).ĭuring ancient times, due to impurities in the smelting process, gold frequently turned a reddish color. The highest karat version of rose gold, also known as crown gold, is 22 karat.Īmongst the alloys made of gold, silver and copper, the hardest is the 18.1 K pink gold (75.7% gold and 24.3% copper). 14K red gold, often found in the Middle East, contains 41.67% copper. Up to 15% zinc can be added to copper-rich alloys to change their color to reddish yellow or dark yellow. 18K pink gold: 75% gold, 20% copper, 5% silver.Examples of the common alloys for 18K rose gold, 18K red gold, 18K pink gold, and 12K red gold include: Pink gold uses the least copper, followed by rose gold, with red gold having the highest copper content. Rose gold jewelry is becoming more popular in the 21st century, and is commonly used for wedding rings, bracelets, and other jewelry.Īlthough the names are often used interchangeably, the difference between red, rose, and pink gold is the copper content: the higher the copper content, the stronger the red coloration. Rose gold, also known as pink gold and red gold, was popular in Russia at the beginning of the 19th century, and was also known as Russian gold, although this term is now obsolete. Rose gold is a gold–copper alloy widely used for specialized jewelry. ![]()
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