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amethyst
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Amethyst A sample of amethyst, trigonal silicon oxide, from Amatitlán, Guerrero, Mex. Amethyst geode from Nova Scotia, Can.
Quizzes
Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.
(Bed) Rocks and (Flint) Stones
Read Next
Reflections in a diamond. (gem; cut gemstone; optics; refraction)
Cold Stones: 9 Gems That Will Make You Feel Like a Peasant
If You'd Only Be My Valentine, American Valentine card, 1910. Cupid gathers a basket of red hearts from a pine tree which, in the language of flowers represents daring. Valentine's Day St. Valentine's Day February 14 love romance history and society heart In Roman mythology Cupid was the son of Venus, goddess of love (Eros and Aphrodite in the Greek Pantheon).
Why Do We Give Valentine Cards?
Calendar showing the month of February
Why Are There Only 28 Days in February?
Discover
An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.
11 Egyptian Gods and Goddesses
Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.
10 Famous Artworks by Leonardo da Vinci
The Jeff Koons tulips sculputure outside the Guggenheim Museums in Bilbao, Spain, Basque Country.
What’s the Difference Between Modern and Contemporary Art?
Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.
12 Greek Gods and Goddesses
Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland
The Largest Islands in the World
Shadow of a man holding large knife in his hand inside of some dark, spooky buiding
7 of History's Most Notorious Serial Killers
African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.
Timeline of the American Civil Rights Movement

amethyst: References & Edit History

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Article History

Type Description Contributor Date
Modified title of Web site: Nature - Scientific Reports - Study on the effect of heat treatment on amethyst color and the cause of coloration. Jun 21, 2024
Add new Web site: Nature - Scientific Reports - Study on the effect of heat treatment on amethyst color and the cause of coloration. Jun 21, 2024
Add new Web site: University of Nebraska–Lincoln - Institute of Agriculture and Natural Resources - Traditional Birthstones - Amethyst (February). Jun 24, 2023
Add new Web site: International Gem Society - Amethyst Value, Price, and Jewelry Information. Apr 28, 2023
Add new Web site: Gemological Institute of America - Amethyst. Mar 16, 2023
Add new Web site: Geology.com - Amethyst. Dec 08, 2022
Add new Web site: Healthline - Do Amethysts Have Any Proven Healing Properties? Sep 01, 2022
Photo of an amethyst sample added. Jan 13, 2010
Added new Web site: Amethyst Galleries - Amethyst, The purple variety of Quartz. May 21, 2008
Article added to new online database. Jul 28, 1999
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