Scale cube=1cm: Full sizing please see photo.

All of our Minerals & Crystals are 100% Genuine Specimens & come with a Certificate of Authenticity.

Jet is a type of lignite, a precursor to coal, and is a gemstone. Jet is not a mineral, but rather a mineraloid. It has an organic origin, being derived from wood that has decayed under extreme pressure. The English noun "jet" derives from the French word for the same material, jaiet (modern French jais), ultimately referring to the ancient town of Gagae. Jet is either black or dark brown, but may contain pyrite inclusions, which are of brassy colour and metallic lustre. The adjective "jet-black", meaning as dark a black as possible, derives from this material.

Jet is a product of high-pressure decomposition of wood from millions of years ago, commonly the wood of trees of the family Araucariaceae. Jet is found in two forms, hard and soft. Hard jet is the result of carbon compression and salt water; soft jet is the result of carbon compression and fresh water.

The jet found at Whitby, in England, is of early Jurassic (Toarcian) age, approximately 182 million years old. Whitby Jet is the fossilised wood from species similar to the extant Chile pine or Monkey Puzzle tree (Araucaria araucana).

ACTUAL AS SEEN: The image shows the EXACT specimen you will receive. The specimen has been carefully hand selected and photographed. Measurements are as accurate as possible, though be aware measuring precise dimensions can be difficult from irregular shaped items. Whilst we portray colours as close to life-like as we can, colours will vary if taken in sunlight, indoors, from monitor to monitor and device to device. Once this specimen is sold, we will update this listing with new similar selected item, with a new photo and dimensions so this listing will change after you purchase. The scale cube in the photo is 1cm to give a visual size.

Unique : (Actual as seen).

Origin : United Kingdom.

Colour : black