Organic material a hardened, fossilized pine tree resin is at least tens of thousands of years old, . May contain whole insects, small animals, plant tissue or air bubbles.
Most often found honey, cognac or "egg yolk" color.
Stores static electricity.
When rubbed, the gem attracts lint.
Is the lightest weight & softest of all gems (a diamond is hardest), not mineral.
Amber is warm against the skin, silky feel. In contrast, minerals and glass are heavier and feel cool or even cold to the touch.
True amber is light enough to float in salt water, like soap would in a bathtub.