Ruby is a mineral corundum, mainly composed of alumina and chromium, which is red, pink or reddish brown (due to the existence of chromium). It is one of the rare gems in the world, mainly produced in Myanmar, Thailand and other places in Asia, and also found in other continents.
In the jewelry industry, rubies are often used to make all kinds of jewelry, such as rings, earrings, necklaces and so on. Setting rubies on gold rings is a common combination, which can not only increase the beauty of rings, but also enhance their value.