Cách sử dụng
Ruby is a type of precious gemstone that comes in shades of red. It is often used in jewelry, such as necklaces, bracelets, and rings. The word "ruby" can also be used to describe something that is a bright red color, like the color of the gemstone. For example, a person's lips might be described as "ruby red". The word "ruby" can also be used as a name for a person, especially if they were born in the month of July, as ruby is that month's birthstone.