American ruby

American Ruby
American Ruby is actually a pyrope garnet, which makes it less expensive than a ruby.
Amethyst
Amethyst is a quartz that varies from transparent deep purple to violet, the deeper the color the higher the value of the gemstone.

American Ruby is actually a semi-precious pyrope garnet and not a ruby. It is has a deep red color.

AMERICAN RUBY
An American ruby is actually a pyrope garnet (and not a ruby at all).
AMETHYST ...

American Ruby
The term "American ruby" is actually a pyrope garnet (and not a ruby at all). There are real rubies found in the US, but they are not referred to as "American rubies." ...

American Ruby: See pyrope garnet.
Amethyst: Semi-precious gemstone. A common form of quartz.

American Ruby: See pyrope garnet.
Ametrine: A mixture of amethyst and citrine, it is partially purple and partially orange-yellow.

American ruby, Black Hills ruby, California ruby,
Montana ruby, Mountain ruby and Rocky Mountain ruby.
Pyrope Garnet ...

American Ruby: Is actually a garnet and less expensive than a ruby.
Amethyst: Is a quartz that comes in a color range from light purple to deep violet. The deeper the color, the more valuable. February birthstone.

The group which assembles in Mandalay is a disparate one, consisting of a French dealer, Olivier Galibert, an American ruby and sapphire expert, Richard Hughes, a Bangkok trader, Mark Smith, and a Mogok dealer, Dr. Thet Oo.

The formula for garnet is: A3B2(SiO4)3. Pyrope garnet is also called (misleadingly) American Ruby, Arizona Ruby, Australian Ruby, Bohemian Ruby, California Ruby, Cape Ruby, Colorado Ruby, Elie Ruby, Montana Ruby, and Rocky Mountain Ruby.

See also: Color, Gemstone, Jewel, Sapphire, Rough