Amber has an amorphous crystal system. This means it started as a tree resin that has aged during the course of millions of years by losing water and is then very gradually mineralized. It is an organic gem and can be a milky white, golden yellow, brown or red depending on the type of tree that gave it its start.
It is generally found within in brown coal deposits. The first precious stone in human history, Amber has been used as a healing stone and amulet for at least 7,000 years.