Fake amber is easily made from plastics, and buyers must beware of cheap imitations sold as natural amber. Amber has a hardness of 2.5 and a specific gravity of 1.05-1.10. Amethyst is usually purple, but can range in color from pale lavender to a very deep, reddish purple to a milky color to green. Deeper-colored amethysts are more highly valued. The ancient Greeks believed that amethyst made one immune to the effects of alcohol.
Synthetic amethysts are hard to distinguish from the real stone.
Ametrine is partially purple and partially orange-yellow. Ammolite is only found in southern Alberta, Canada. An amorphous gem, like jet, amber, or ivory, does not have a regular internal structure, like those gems that fall within the seven crystal systems . An amulet is a protective charm that is worn. It is worn in the hope of protecting the wearer from evil or illness or to bring the wearer good luck.