Search results
Results from the WOW.Com Content Network
Amethyst is also found and mined in South Korea. [19] The large opencast amethyst vein at Maissau, Lower Austria, was historically important, [1] but is no longer included among significant producers. [14] Much fine amethyst comes from Russia, especially near Mursinka in the Ekaterinburg district, where it occurs in drusy cavities in granitic ...
Heat can either improve or spoil gemstone color or clarity. The heating process has been well known to gem miners and cutters for centuries, and in many stone types heating is a common practice. Most citrine is made by heating amethyst, and partial heating with a strong gradient results in "ametrine" – a stone partly amethyst and partly citrine.
Turquoise is found in only a few places on Earth, and the world's largest turquoise-producing region is the southwest United States. Turquoise is prized for its attractive colour, most often an intense medium blue or a greenish blue, and its ancient heritage. Turquoise is used in a great variety of jewellery styles.
Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 hide
Amethyst: Birthday (day of the week) stones. While the term "birthday stone" is sometimes used as a synonym for a birthstone, each day of the week is also assigned a ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The five cardinal gems. Clockwise from top: sapphire, ruby, emerald, amethyst, diamond. Cardinal gems are gemstones which have traditionally been considered precious above all others. The classification of the cardinal gems dates back to antiquity, and was largely determined by ceremonial or religious use as well as rarity. [1]
One such heroic cat was Simon, who famously guarded his soldiers aboard the HMS Amethyst, a guard ship deployed to protect the British Embassy in Nanjing, China, amidst the Chinese Civil War in 1949.