Jet is a hard gem variety of Lignite. Jet is a type of brown coal, a
fossilised wood of an ancient tree similar to our present monkey puzzle
trees and cypress trees. These trees flourished in the Jurassic period
when the trees died and fell they were eventually washed into rivers and
seas to lie at the bottom for millions of years. All the other sediment
built up causing great pressure, which flattened the wood and together
with chemical changes altered the wood to jet. Jet has been used in
Jewellery since ancient times and Queen Victoria wore Whitby jet as part
of her mourning dress making it very popular.
No comments:
Post a Comment