FACTOID # 2: Puerto Rico has roughly the same gross state product as Montana, Wyoming and North Dakota combined.
 
 Home   Encyclopedia   Statistics   States A-Z   Flags   Maps   FAQ   About 
   
 
WHAT'S NEW
RELATED ARTICLES
People who viewed "Aquamarine" also viewed:
 

SEARCH ALL

FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:

 

 

(* = Graphable)

 

 


Encyclopedia > Aquamarine
Aquamarine, March's Birthstone

Aquamarine
General
Category beryl mineral variety
Chemical formula Be3Al2Si6O18[1]
Identification
Color transparent (or can be translucent if included), greenish blue to blue green, typically light in tone[1]
Crystal system hexagonal[1]
Cleavage very difficult in one direction, almost never seen[1]
Fracture conchoidal[1]
Mohs Scale hardness 7.5 - 8[1]
Luster vitreous to resinous[1]
Polish luster vitreous [1]
Refractive index 1.577 - 1.583 (+/- .017)[1]
Optical Properties Double refractive, uniaxial negative[1]
Birefringence .005 - .009[1]
Dispersion .014[1]
Pleochroism weak to moderate, blue and greenish blue; or different tones of blue with lighter tones associated with the optic axis direction [1]
Ultraviolet fluorescence inert[1]
Absorption spectra indistinct lines at 537 and 456nm. Depending on the depth of color, there is a strong line at 427nm.[1]
Specific gravity 2.72 (+.18, -.05)[1]
Three Beryl Crystals - Aquamarine rough crystal in the center
Three Beryl Crystals - Aquamarine rough crystal in the center

Aquamarine (Lat. aqua marinā, "water of the sea") is a gemstone-quality transparent variety of beryl, having a delicate blue or turquoise 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. Aquamarine may mean: Aquamarine, a gemstone-quality blue beryl Aquamarine (color), a color, a shade between green and blue Aquamarine (film), a 2006 film starring Sara Paxton, Emma Roberts and JoJo The USS Aquamarine (PYc-7), a patrol vessel of the United States Navy, named for the stone. ... Image File history File links Aquamarin_cut. ... A chemical formula is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... A crystal system is a category of space groups, which characterize symmetry of structures in three dimensions with translational symmetry in three directions, having a discrete class of point groups. ... A regular hexagon A hexagon (also known as sexagon) is a polygon with six edges and six vertices. ... Cleavage, in mineralogy, is the tendency of crystalline materials to split along definite planes, creating smooth surfaces, of which there are several named types: Basal cleavage: cleavage parallel to the base of a crystal, or to the plane of the lateral axes. ... For other uses, see Fracture (disambiguation). ... A conchoidal fracture is produced when some types of fine-grained mineral, such as obsidian and flint, are broken. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... Lustre (American English: luster) is a description of the way light interacts with the surface of a crystal, rock or mineral. ... Vitreous refers to a material in an amorphous, glassy state (in contrast to a crystalline state). ... Vitreous refers to a material in an amorphous, glassy state (in contrast to a crystalline state). ... The refractive index (or index of refraction) of a medium is a measure for how much the speed of light (or other waves such as sound waves) is reduced inside the medium. ... A calcite crystal laid upon a paper with some letters showing the double refraction Birefringence, or double refraction, is the decomposition of a ray of light into two rays (the ordinary ray and the extraordinary ray) when it passes through certain types of material, such as calcite crystals, depending on... Dispersion of a light beam in a prism. ... Pleochroism is an optical phenomenon in which grains of a rock appear to be different colors when observed at different angles,under a petrographic microscope. ... Fluorescence induced by exposure to ultraviolet light in vials containing various sized Cadmium selenide (CdSe) quantum dots. ... Absorption spectroscopy refers to a wide range of techniques where one measures how much light of a particular wavelength (color) is absorbed by a sample. ... Relative density (also known as specific gravity) is a measure of the density of a material. ... Image File history File links Size of this preview: 756 × 600 pixel Image in higher resolution (1210 × 960 pixel, file size: 235 KB, MIME type: image/jpeg) Source: Chris Ralph. ... Image File history File links Size of this preview: 756 × 600 pixel Image in higher resolution (1210 × 960 pixel, file size: 235 KB, MIME type: image/jpeg) Source: Chris Ralph. ... For other uses, see Gemstone (disambiguation). ... Three varieties of beryl: Morganite, Aquamarine, and Heliodor The mineral beryl is a beryllium aluminium cyclosilicate with the chemical formula Be3Al2(SiO3)6. ... Annual mean sea surface salinity for the World Ocean. ... This article or section does not cite its references or sources. ... Beryl var. ... Morganite is a pink coloured gem quality beryl, orange/yellow morganite is sometimes found also, it turns pink upon high temperature treatment. ...

Contents

Composition

Aquamarine is a beryl with a hexagonal crystal structure and a chemical formula of Be3Al2Si6O18, a beryllium aluminium 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 indices range around 1.57 to 1.58. In crystallography, the hexagonal crystal system is one of the 7 lattice point groups. ... Enargite crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... A chemical formula is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... General Name, symbol, number beryllium, Be, 4 Chemical series alkaline earth metals Group, period, block 2, 2, s Appearance white-gray metallic Standard atomic weight 9. ... Aluminum redirects here. ... The silicate minerals make up the largest and most important class of rock-forming minerals. ... Relative density (also known as specific gravity) is a measure of the density of a material. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... The refractive index (or index of refraction) of a medium is a measure for how much the speed of light (or other waves such as sound waves) is reduced inside the medium. ...


Locations of deposits

It occurs at most localities which yield ordinary beryl, some of the finest coming from Russia. The gem-gravel 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. Miners operate a hydraulic sluice in San Francisquito Canyon, Los Angeles County. ... Corundum (from Tamil kurundam) is a crystalline form of aluminium oxide and one of the rock-forming minerals. ...


In the United States, aquamarines can be found at the summit of 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. The deeper the blue color, the more valuable the gem is considered. Mount Antero is the tenth highest peak in Colorado with an elevation of 14,269 feet. ... The Sawatch Range (sometimes Saguache Range) is a mountain range in central Colorado containing several of the Rocky Mountains highest peaks, including Mount Elbert, at 14,440 ft (4,401 m) the highest peak in the Rockies. ... Official language(s) English Capital Denver Largest city Denver Largest metro area Denver-Aurora Metro Area Area  Ranked 8th  - Total 104,185 sq mi (269,837 km²)  - Width 280 miles (451 km)  - Length 380 miles (612 km)  - % water 0. ... Capital (and largest city) Belo Horizonte Demonym Mineiro Government  -  Governor Aécio Neves  -  Vice Governor Antônio Augusto Junho Anastasia Area  -  Total 588,528. ... Capital Vitória Largest city Vila Velha Demonym capixaba or espiritossantense Government  -  Governor Paulo Hartung  -  Vice Governor Ricardo Ferraço Area  -  Total 46. ... Flag of Bahia See other Brazilian States Capital Salvador Largest City Salvador Area 564 273 km² Population   - Total   - Density 13 070 250 23. ...


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.


Aquamarine is the official state gem of Colorado. // Not every state has an official state mineral, rock, stone or gemstone. ...


Culture and historical/mythical usage

  • Aquamarine (along with Bloodstone) is the birthstone associated with March. It is also the gemstone for the 19th Anniversary.
  • People in the Middle Ages thought that aquamarine could magically overcome the effects of poison.
  • Ancient sailors traveled with aquamarine crystals, believing that it would ensure a safe passage, and often slept with the stones under their pillow to ensure sound sleep. They believed the siren’s (mermaid) fish-like lower body was made of aquamarine.

A birthstone is a gemstone or other semi-precious stone which is associated with a month of the Gregorian Calendar. ... The Middle Ages formed the middle period in a traditional schematic division of European history into three ages: the classical civilization of Antiquity, the Middle Ages, and modern times, beginning with the Renaissance. ... The skull and crossbones symbol (Jolly Roger) traditionally used to label a poisonous substance. ... For other uses, see Mermaid (disambiguation). ...

See also

Wikimedia Commons has media related to:
Aquamarine

Image File history File links Commons-logo. ... Gem animals. ...

References

  1. ^ a b c d e f g h i j k l m n o p Gemological Institute of America, GIA Gem Reference Guide 1995, ISBN:0-87311-019-6

  Results from FactBites:
 
Aquamarine - Facts, Lore, History, Myths and Pictures (385 words)
Aquamarine is a member of the beryl family and ranges in color from an almost colorless pale blue to blue-green or teal.
Aquamarines on the market today are usually faceted, but when cut as a cabochon, they may display a cat's eye effect known as asterism.
Aquamarines are often heat treated to change a blue-green or teal colored stone to a pure blue.
Aquamarine - Wikipedia, the free encyclopedia (371 words)
Aquamarine is a beryl with a hexagonal crystal structure and a chemical formula of Be Al
Aquamarine typically is on the low end of the specific gravity range, normally at less than 2.7.
Aquamarine is the official state gem of Colorado.
  More results at FactBites »

 
 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments

Want to know more?
Search encyclopedia, statistics and forums:

 


Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m