Look up: Quartz

1. 
   Quartz
   Quartz is a common crystalline mineral.
   Found on http://www.enchantedlearning.com/subject
   
   
2. 
   Quartz
   Quartz has the formulae SiO2 and a relative hardness of 7. It is a very widespread mineral which occurs as an important constituent of igneous rocks which have an excess of silica. Very resistant to mechanical and chemical attack. Massive, fine grained types are called jasper, chert, flint, agate. Coarse crystalline types called amethyst, rose quartz etc.
   Found on http://www.encyclo.co.uk/nol.php
   
   
3. 
   quartz
   [n] - a hard glossy mineral consisting of silicon dioxide in crystal form
   Found on http://www.webdictionary.co.uk/definitio
   
   
4. 
   Quartz
   (SiO2) The most common silica mineral.
   Found on http://www.quartznall.co.uk/glossery.htm
   
   
5. 
   Quartz
   Code-name for a tablet-like, quarter-VGA portrait screen size, pen-based, reference design.
   Found on http://www.free-poly-ringtones.co.uk/glo
   
   
6. 
   Quartz
   Photograph of a quartz molecular model, courtesy of Indigo® Instruments.Found naturally as faceted crystals. Its birefringent properties are used in the production of optical quarter-wave plates and polarizers. A mineral whose primary component is silicon dioxide (SiO₂). Its colour and other aspects of its appearance depended on the impu...
   Found on http://www.diracdelta.co.uk/science/sour
   
   
7. 
   quartz
   is the name given to various kinds of silica in crystal form Category: Mining
   Found on http://www.mijnwoordenboek.nl/definition
   
   
8. 
   quartz
   The most common of stones, used for decoration since the Classical period. When free from impurities, it is a colourless rock crystal; other forms most commonly used as gemstones since the 19thC include the amethyst in all shades of violet, the cairngorm in yellow and brown, and the yellow citrine which is often wrongly referred to as topaz. The ph ...
   Found on http://www.antique-crafts.co.uk/glossary
   
   
9. 
   Quartz
   Quartz noun [ German quarz .] (Min.) A form of silica, or silicon dioxide (SiO ₂ ), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque. » The crystalline varieties incl ...
   Found on http://www.encyclo.co.uk/webster/Q/6
   
   
10. 
    quartz
    <chemical> A form of silica, or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colourless and transparent, but sometimes also yellow, brown, purple, green, and of other colours; also in cryptocrystalline massive forms varying in colour and degree of transparency, being sometimes opaque. ... The crystalline varietie ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
11. 
    quartz
    noun a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
12. 
    Quartz
    `Quartz` (from German ) is the second most common mineral in the Earth's continental crust, feldspar being the first. It is made up of a lattice of silica tetrahedra. Quartz has a hardness of 7 on the Mohs scale and a density of 2.65 g/cm³.
    Found on http://en.wikipedia.org/wiki/Quartz
    
    
13. 
    Quartz
    • (n.) A form of silica, or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque.
    Found on http://thinkexist.com/dictionary/meaning
    
    
14. 
    quartz
    A crystalline form of silicon dioxide used in chemical apparatus and in optical and electric instruments.
    Found on
    
    
15. 
    Quartz
    A material frequently used in projectile points and other artifacts. When quartz is clear and colorless it is called rock crystal; milky wuartz is milky white; smoky quartz is clouded a brown color; rose quartz is a pale red color; sugar quartz is the color of brown sugar.
    Found on http://members.aol.com/artgumbus/glossar
    
    
16. 
    Quartz
    Tungsten-Halogen lights or lighting units. The name is derived from the material which encloses the lighting element. (Lighting)
    Found on http://www.filmland.com/glossary/Diction
    
    
17. 
    quartz
    A hard mineral, that is a crystalline form of silica (silicon dioxide, SiO₂); it is colorless when pure ('rock crystal'). Quartz is a constituent of many rocks, especially igneous rocks such as granite and quartzite, metamorphic rocks such as gneisses and schists, an...
    Found on http://www.daviddarling.info/encyclopedi
    
    
18. 
    quartz
    quartz, one of the commonest of all rock-forming minerals and one of the most important constituents of the earth's crust. Chemically, it is silicon dioxide, SiO2. It occurs in crystals of the hexagonal system, commonly having the form of a six-sided prism terminating in a six-sided pyramid; the cry...
    Found on http://www.infoplease.com/ce6/sci/A08407