Opal

Opal is an amorphous, or non-crystalline form of silica with the formulae SiO2ùnH2O and a relative hardness of 6. It is always a secondary mineral, found lining and filling cavities in igneous and sedimentary rocks where it has been deposited by hot waters. The ordinary varieties are common but the precious varieties are quite valuable. Opal is al...
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OPAL

Older People with Active Lifestyles - a demographic grouping.
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opal

[n] - a translucent mineral consisting of hydrated silica of variable color
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Opal

O'pal noun [ Latin opalus : confer Greek ..., Sanskrit upala a rock, stone, precious stone: confer French opale .] (Min.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity. » The precious opal presents a pecul...
Found on http://www.encyclo.co.uk/webster/O/22

opal

<chemical> A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity. ... The precious opal presents a peculiar play of colours of delicate tints, and is highly esteemed as a gem. One kind, with a varied play of colour in a reddish ground, is called the harlequin opal. The fire opal has colours like...
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opal

noun a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones
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Opal

• (n.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity.
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opal

silica mineral extensively used as a gemstone, a submicrocrystalline variety of cristobalite (q.v.). In ancient times opal was included among the ... [3 related articles]
Found on http://www.britannica.com/eb/a-z/o/22

Opal

Opal is a English girl name. The meaning of the name is `Precious Jewel` Where is it used? The name Opal is mainly used In English.How do they say it elsewhere? Opaline ( In English) From Old English. Opal doesn`t appear In 2007`s top-1000 name list.The last time Opal appeared In the top-1000 was 48 years ago, In 1960. It ranked #920 In that ...
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Opal

[armoured personnel carrier] The Opal``-I``` is a multi-purpose fully amphibious armoured personnel carrier developed and produced by HSW S.A.. APC is a development of MT-LB that was produced in HSW on licence. Major changes are with reworked nose section and propellers for better in water speed and manoeuvrability, new turret with 12.7 mm ...
Found on http://en.wikipedia.org/wiki/Opal_(armoured_personnel_carrier)

Opal

[given name] Opal is a feminine given name derived from the name of the gemstone opal. The gemstone is the birthstone for October. Its name is derived from the Sanskrit उपल or upala, which means `jewel. It came into use along with other gemstone names during the late Victorian era. Opal was among the 100 most popular names for girls b...
Found on http://en.wikipedia.org/wiki/Opal_(given_name)

OPAL

(Orbiting PicoSat Launcher) A small Stanford University satellite, launched from the JAWSAT payload adaptor on Jan. 26, 2000, and which in turn deployed six even smaller picosatellites. Two of these picosatellites were tethered and built by the Aerospace Corporation for ARP...
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opal

Opal. Credit: Wikipedia A cryptocrystalline variety of porous hydrated silica, deposited from aqueous solution in all kinds of rocks, and also formed by replacement of other minerals. Opals are variously colored; the best gem varieties are translucent, with milky or pearly opalescence and iride...
Found on http://www.daviddarling.info/encyclopedia/O/opal_mineral.html

opal

opal (ō'pul) , a mineral consisting of poorly crystalline to amorphous silica, SiO2·nH2O; the water content is quite variable but usually ranges from 3% to 10%. Common opal is usually colorless or white, but it may be gray, brown, yellow, or red; the color is due to fine-grained imp...
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opal

Form of hydrous silica (SiO2.nH2O), often occurring as stalactites and found in many types of rock. The common opal is translucent, milk-white, yellow, red, blue, or green, and lustrous. Precious opal is opalescent, the characteristic play of colours being caused by close-pack...
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OPAL

Older People with Active Lifestyles - demographic group.
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Opal

[software] The Garden album cover ...
Found on http://en.wikipedia.org/wiki/Opal_(software)

OPAL

[software] The Open Physics Abstraction Layer (OPAL) is an open source realtime physics engine API similar to PAL. It is currently supported only by ODE, but can be extended to run off of other engines. OPAL is free software, released under both the LGPL and the BSD license. It was originally designed and written by Tyler Streeter, Andres R...
Found on http://en.wikipedia.org/wiki/OPAL_(software)

Opal

[disambiguation] An opal is a gemstone. Opal may also refer to: ==Places== ==Research facilities== ==Computing== ==Military== ==Fiction== ==Other uses== ...
Found on http://en.wikipedia.org/wiki/Opal_(disambiguation)

Opal

[fuel] Opal is a variety of low-aromatic 91 RON petrol developed in 2005 by BP Australia to combat the rising use of petrol as an inhalant in remote Indigenous Australian communities. Though more expensive to produce, requiring a $0.33/litre Federal subsidy, a 2006 report found it would likely save at least $27 million per year when the soc...
Found on http://en.wikipedia.org/wiki/Opal_(fuel)

Opal

[programming language] OPAL (OPtimized Applicative Language) is a functional programming language first developed at the Technical University of Berlin. ==Example program== This is an example OPAL program, which calculates the GCD recursively. Signature file: Implementation file: ...
Found on http://en.wikipedia.org/wiki/Opal_(programming_language)

Opal

Opal is a hydrated amorphous form of silica; its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike the other crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fiss...
Found on http://en.wikipedia.org/wiki/Opal

opal

Sometimes the term used for opaque, deep red color of a wine as part of a Wine speech . This is derived from the same often opaque gemstone that comes in bright colors.
Found on http://www.wein-plus.eu/en/opal_3.0.10218.html

opal

An irridescent semiprecious stone with inclusions of many colours that give it fire, and a high water content. Opals have a hardness of 5.5-6.5 on the Mohs Scale
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opal

A semi-precious stone with a rainbow-like iridescence. Defined as three types: opalescent precious opals, yellow-red fire opals, and the common opal.
Found on http://www.inlandlapidary.com/user_area/lapidary_terms.asp
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