Jet is actually a fossilised wood rather than a stone, formed around 180 million years ago by Araucaria tree. The most famous Jet comes from the UK, in Whitby, and was made popular by the Victorians. Whitby Jet is where the expression 'jet black' originates from, due to its intense deep black. Jet has been mined since 1400 BC, for use in jewellery and as a protection stone. Jet can also become electrically charged, in a similar way to amber, by rubbing it with a soft cloth.

Jet can help to boost sexual energy and helps to manifest wealth and prosperity. It is known for its strong grounded energy, which can bring calmness and stability to the wearer. Jet is also believed to provide protection against illness and violence. It can also help relieve depression and fear, making it a popular choice for those seeking emotional support.