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Raw amethyst grows as a six-sided crystal that can also form a crystalline covering a rock. Amethyst is found inside of geodes and alluvial deposits. Manganese in clear quartz produces the amethyst, while the amount of i... More »

The Taj Mahal sits on the banks of the Yamuna River in Agra, India, was built as a tomb, has architectural features from three different cultures and is a designated UNESCO World Heritage site. The structure is only part... More »

www.reference.com Geography

Fluoride is an abundant, natural element that is also synthesized in laboratories and added to drinking water, toothpaste and mouthwash to prevent tooth decay. It is also taken orally to treat osteoporosis, rheumatoid ar... More »

www.reference.com Health Dental Dental Hygiene
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As of 2014, most amethyst comes from Brazil and Uruguay. Before amethyst was discovered in these locations, amethyst was mined in Sri Lanka, Germany, India and the Ural Mountains in Russia. More »

Some birthstone colors are red for pyrope garnet, blue for aquamarine, purple for amethyst and green for peridot. Other colors include orange for topaz, iridescent for pearl and multicolor or black for opal. More »

The birthstones for each month are garnet for January, amethyst for February, aquamarine for March, diamond for April, emerald for May, pearl for June, ruby for July, peridot for August, sapphire for September, opal for ... More »

Birthstone gems come in a variety of colors, such as January's deep red garnet and the purple or violet amethyst of February. Since some months have multiple birthstones, certain birthdays come with a choice of colors. More »