Difference between revisions of "Quartz - Polycrystalline"

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MICROCRYSTALLINE (quartz)
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Microcrystalline means that the crystals are not recognizable with the naked eye or with a standard microscope.
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Minerals made up from even smaller crystals are said to be cryptocrysalline from the greek word 'Kruptos' meaning hidden
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and are classed as being massive in their habit because they have no orderly stucture. Most are semi-transparent to opaque.
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With modern day microscopes with high magnification power, these terms don't seem valid anymore and are refered to as polycrystalline.
  
The crystals are not recognizable with the naked eye or with a standard microscope
 
also known as cryptocrysalline from the greek word 'Kruptos' meaning hidden
 
and are classed as being massive in their habit because they have no orderly stucture and most are semi-transparent to opaque
 
 
Includes stones classified as varieties of the quartz species:
 
Includes stones classified as varieties of the quartz species:
amethyst, aventurine, rock crystal, blue quartz, citrine, hawk's eye,
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* [[chalcedony]]
prasiolite, quartz cat's eye, smoky quartz, rose quartz and tiger's eye
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* [[aventurine quartz]]
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* [[hawk's eye]]
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* [[prasiolite]]
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* [[quartz cat's eye]]
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* [[rose quartz]]
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* [[tiger's eye]]

Revision as of 03:25, 29 July 2007

Microcrystalline means that the crystals are not recognizable with the naked eye or with a standard microscope.

Minerals made up from even smaller crystals are said to be cryptocrysalline from the greek word 'Kruptos' meaning hidden and are classed as being massive in their habit because they have no orderly stucture. Most are semi-transparent to opaque.

With modern day microscopes with high magnification power, these terms don't seem valid anymore and are refered to as polycrystalline.

Includes stones classified as varieties of the quartz species: