Benitoite is a rare mineral that is often referred to as the "blue diamond" due to its vivid deep blue hue. Although it has a unique name, there are several synonyms used for this mineral. It is also called benito diamond, benitite, and blue barite. The mineral was discovered in San Benito County, California, which explains the origin of its name. It is composed of barium, titanium, and silicate, and is an indicator mineral for the presence of diamonds. Due to its rarity and beauty, it is highly sought after by collectors and can fetch high prices in the market.