A Selenite coffin is a type of coffin or burial container made from the mineral known as Selenite. Selenite is a form of gypsum, characterized by its translucent or white color and natural striations or fibrous patterns.

Selenite coffins are primarily used in certain spiritual or metaphysical practices where Selenite is believed to possess unique energetic properties. Selenite is associated with purification, spiritual guidance, and protection. It is considered a high vibration crystal that can help cleanse and align one's energy.

In some belief systems, Selenite is thought to aid in the transition of the soul from the physical realm to the afterlife. The use of a Selenite coffin is seen as a way to create a sacred and energetically supportive environment for the deceased.