Buyers who are not fond of natural yellow gold tones look for jewelry with their choice of colors. And since all colored gold consists of alloys, it can never be 24 karats. But 18k white gold with a mix of platinum can be pricier compared to pure gold.
When we talk about fine jewelry, a lot of colored gold pieces are 18 karats and it is very uncommon to find anything that goes beyond 22k. A lot of colored gold utilizes a system of copper, silver and gold in varying ratios to create hues of yellow, white, red and green. When jewelry manufacturers take away copper from the mixture, silver and gold blends produce green gold. A lot of different alloys are used to create purple gold and blue gold, both of which are fragile and are usually reserved for ornamental accents on jewelry.
With differences in ratio, copper, and gold when combined produces hues of red and pink known as rose gold. In order to produce black gold, a process needs to be completed. Black gold is produced through a number of chemical processes that includes cobalt, chromium, ruthenium, and rhodium as alloys.
The surfaces of black gold jewelry pieces are prone to scratches and most if not all evanescence over time. When it comes to multi-tone gold jewelry items you need to amalgamate two or more hues with every item. This type of jewelry comes with an expensive price tag owing to the time it takes to produce such jewelry works.