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Chinese Name:煤玉/煤精
English Name:Jet
Chemical Composition:Hydrocarbons with traces of minerals
Crystal System:Amorphous, Organic Material
Hardness:2.5 - 4
SG:approx 1.3
RI:approx 1.6
Related Chakra:Root
Locality:Whitby (England), China, France, Mongolia, New Mexio, Siberia and Spain
Colour:Black
Remarks:
It's a form of fossilized wood, Aged: around 180 million years ago.

Jet is found in two forms, hard and soft. Hard jet is the result of the carbon compression and salt water; soft jet is the result of the carbon compression and fresh water.
Their appearance is relatively the same, but soft jet is a good deal more brittle and fragile than hard.

Whitby - Hard
Spain, France and North America - Soft

How it formed:
The wood was originally buried in the muddy sediment on the sea floor or within stagnant swamps.

Jet is formed within sedimentary rocks, by the long-term effects of increased temperature in oxygen-depleted conditions.

Jets from these different localities have slightly different properties and Whitby is a specific form of jet derived from weed which is a relative of todays monkey puzzle tree (araucaria araucana).

The history of Jet traces the development of prehistoric man from as early as the Stone Age and has continued to be more or less significant up to the present day.
During the Roman regins, jet was quite popular as a magic stone. It was used in jewelry and said to protect one from the "evil eye."
During Victorian times it was used mainly for jewelry, also lead to the rise of the price.

 
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Functions:
1. Wear as a talisman.
2. As a powerful bringer of good fortune
3. Protection against evil and all negative energies.
4. Jet also has energies making it protective to finances and business and brings stability to these realms.
5. Jet can also be helpful for those experiencing an overabundance of negative energies or emotions, and has traditionally been used as a stone to alleviate grief.
6. Jet also eases anxiety and depression, calming anxious or fearful thinking as well as delusions. Ease of anxiety and depression can then bring about inner growth, increase self-reliance, and ease change in any areas of life.
   
General care:
1. Avoid contact with perfumes, hair spay, make-up.
2. Gem can be scratched easily, so wear with caution.
3. Avoid shock.
4 Avoid heat.
5. Do not soak in jewellery cleaner.
6. Avoid contact with household cleaners.
7. Avoid using ultrasonic and steam cleaners.
8. Cleaning: Clean using lukewarm plain water and dry using a soft cloth.
 
  Reference: http://geology.com/gemstones/jet/; https://en.wikipedia.org/wiki/Jet_(lignite); http://meanings.crystalsandjewelry.com; http://www.healingcrystals.com;
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