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<div>{{otheruses1|the mineral}}<br />
[[Image:Aquamarin cut.jpg|Aquamarine|thumb|250px]]<br />
'''Aquamarine''' (Lat. ''aqua marina'', "water of the sea") is a [[gemstone]]-quality transparent variety of [[beryl]], having a delicate blue or blue-green color, suggestive of the tint of [[seawater]]. It's closely related to the gem [[emerald]]. Colors vary and yellow beryl, called ''heliodor''; rose pink beryl, ''morganite''; and white beryl, ''goshenite'' are known. <br />
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Aquamarine is a beryl with a [[Hexagonal (crystal system)|hexagonal]] crystal structure and a chemical formula of Be<sub>3</sub>Al<sub>2</sub>Si<sub>6</sub>O<sub>18</sub>, a [[beryllium]] [[aluminium]] [[Silicate minerals|silicate mineral]]. It has a [[specific gravity]] of 2.68 to 2.74 and a [[Mohs hardness]] of from 7.5 to 8. Aquamarine typically is on the low end of the specific gravity range, normally at less than 2.7. The pink variety exhibits a high specific gravity of around 2.8. [[Refractive index|Refractive indices]] range around 1.57 to 1.58.<br />
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It occurs at most localities which yield ordinary beryl, some of the finest coming from [[Russia]]. The gem-gravel [[Placer mining|placer]] deposits of [[Sri Lanka]] contain aquamarine. Clear yellow beryl, such as occurs in [[Brazil]], is sometimes called aquamarine chrysolite. When [[corundum]] presents the bluish tint of typical aquamarine, it is often termed Oriental aquamarine. <br />
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In the [[United States]], aquamarines can be found at the summit of [[Mount Antero|Mt. Antero]] in the [[Sawatch Range]] in central [[Colorado]]. In [[Brazil]], there are mines in the states of [[Minas Gerais]], [[Espírito Santo]] and [[Bahia]]. Zambia also produces nice aquamarine as well as Madagascar, Malawi,Tanzania and Kenya. Much of today's aquamarine is heated to give it a better color blue.<br />
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The biggest aquamarine ever mined was found at the city of Marambaia, Minas Gerais, Brazil, in 1910. It weighed over 110 kg, and its dimensions were 48.5 cm long and 42 cm in diameter.<br />
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Aquamarine is the [[List of U.S. state minerals, rocks, stones and gemstones|official state gem]] of Colorado.<br />
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==Culture and historical/mythical usage==<br />
*Aquamarine is the [[birthstone]] associated with March. It is also the gemstone for the 19th Anniversary.<br />
*People in the [[Middle Ages]] thought that aquamarine could magically overcome the effects of [[poison]].<br />
*Ancient sailors traveled with aquamarine crystals, believing that it would insure a safe passage, and often slept with the stones under their pillow to insure sound sleep. They believed the siren’s (mermaid) fish-like lower body was made of aquamarine.<br />
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== See also ==<br />
* [[List of minerals]]<br />
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== References ==<br />
* Weinstein, Michael, 1958, ''The World of Jewel Stones'' Sheriden House, New York, pp 104-107<br />
* Diamond Bug. [http://diamondbug.blogspot.com/2006/03/flawless-aquamarine-march-birthstone.html "Flawless Aquamarine: March Birthstone"]. Retrieved March 16, 2006.<br />
* Aquamarine Scientific Information [http://gemstones.mysolitaire.com/aquamarine.htm "Aquamarine scientific Information"]<br />
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[[Category:Silicate minerals]]<br />
[[Category:Gemstones]]<br />
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[[bg:Аквамарин]]<br />
[[da:Akvamarin]]<br />
[[de:Aquamarin]]<br />
[[et:Akvamariin]]<br />
[[fr:Aigue-marine]]<br />
[[he:אקוומרין]]<br />
[[lt:Akvamarinas]]<br />
[[nl:Aquamarijn]]<br />
[[ja:アクアマリン]]<br />
[[no:Akvamarin]]<br />
[[pl:Akwamaryn]]<br />
[[pt:Água-marinha]]<br />
[[ru:Аквамарин]]<br />
[[sl:Akvamarin (kamen)]]<br />
[[vi:Berin]]<br />
[[sv:Akvamarin]]<br />
[[tr:Akuamarin]]<br />
[[uk:Аквамарин]]</div>72.13.239.239