Ulexite is a mineral composed of hydrated sodium calcium borate. It is often found in evaporite deposits and is known for its unique fibrous structure, which gives it the ability to transmit light. This property has earned it the nickname "TV rock" because it can project images through its fibers. Ulexite typically appears as white or colorless, but it can also have a slightly translucent quality. It is primarily used in the production of boron compounds and has applications in glass and ceramics. Additionally, boron is an essential element in various industrial processes.