What are the possible colors for gold? Which colors are naturally occurring and which ones are artificially created?

Apart from the all too familiar yellow gold precious metal we have all grown accustomed to, there are other colors available for gold. The most popular color is by far white gold, but in fact this sort of gold is merely a platinum coating mounted on top of regular yellow gold. That is, in regards to your question, white gold does not appear naturally in the environment, but rather industrially created. Another popular color is red gold or otherwise referred to as rose gold, which occurs due to copper supplements added to natural gold. Different hues of red color could be achieved according to the amount of copper artificially inserted to the gold alloy. With the development of new synthesizing technologies, more colors have been made available to the gold jewelry consumption population. Such colors include black gold, green gold, purple gold and blue gold. All colors are artificially created in a laboratory, but nonetheless could be very valuable despite that fact. For example, purple gold is achieved by inserting aluminum to the gold alloy consisting of about 80% content of gold. Thus, purple gold could be easily valued at 18 karats of gold, making it very costly indeed. Blue gold is created by the incorporating indium into the gold alloy while black gold is achieved via electro-deposition using black rhodium or alternatively ruthenium. As you can clearly see, apart from the normal yellow gold we are all familiar with, all other colors possible for gold to take on are artificially created in a laboratory. Hence, no oddly colored gold material could naturally occur in our environment.

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