18k gold is softer with a slightly brighter colouring because it contains 18 parts pure gold and 6 parts alloys. We suggest being mindful of the piece by taking it off from the sides and removing it completely for labor-intensive work.
Platinum rings are usually 90% pure platinum
The metals most commonly added to create yellow gold are silver, copper, and zinc. This unique mixture gives yellow gold it’s distinct color.
Yellow gold most closely resembles pure gold, but it is also typically softer than other alloys and has a tendency to scratch more easily. It can be polished periodically, but with each polish a small amount of metal is lost.
White gold is typically a result of some combination of gold with nickel, palladium, and silver. Its properties can vary dramatically depending on the metals and proportions used in the mix. This is done deliberately for different purposes.
Rose gold is a mix of pure gold and copper. It is sometimes referred to as "pink" or "red" gold as well.