White gold and yellow gold

Gold is a popular ring material and comes in many variations.
Yellow gold is one of the alloys that tends to be similar in color to 24K gold, while 18K yellow gold, for example, has the color of pure gold, with a hint of yellow mixed in with the golden color.
In the case of 18-karat gold, when pure gold is mixed with silver and copper in equal parts, an alloy with a color classified as yellow gold is produced. However, as the percentage of gold added decreases, the gold color generally fades gradually. Metals added to create the alloy include not only silver and copper, but also palladium, etc.

White gold is another alloy that is often seen as a ring material. White gold is a silvery-white gold that was developed in the 20th century as a material aiming to achieve a shine similar to platinum.
In the case of 18k white gold, the ratio of 24k gold is 75%, but the silvery-white metals such as palladium and silver are mixed in large amounts, which causes the gold color to fade. The other metals added increase its durability and make it last longer, so it is recommended as a ring material. White gold rings are often plated with rhodium to prevent them from tarnishing.
When your silver becomes dull, you can restore its original shine with some care. Kasu Studio sells silver polish and other maintenance products.