Difference between revisions of "Fluorescent minerals"

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== Description ==
 
== Description ==
  
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test1 test test
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A family of minerals composed of trisilicates with [[aluminum]], [[iron]], [[calcium]], [[magnesium]], [[manganese]], or [[chromium]]. Garnets are found in deposits around the world as transparent crystals embedded in igneous and metamorphic rocks. They have been used as gemstones since antiquity. The ruby red [[pyrope]] and the lighter red [[almandine]] were the most highly prized varieties. The pale rose-purple [[rhodolite]] is a mixture of pyrope and almandine. Garnets are also used as abrasives. The crushed, ground and cleaned garnet is sold as an abrasive powder, coated paper and coated cloth. Garnet particles have sharper cutting edges than aluminum oxide, but are expensive. To decrease costs, some commercially available garnet cloths are actually prepared with quartz. Sources of gem quality garnets include the Czech Republic, South Africa, Australia, China, India, Brazil, Sri Lanka, and the U.S (New York, Maine, Idaho).
  
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&epsilon (from help page - doesn't seem to work)
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[[File:Garnetemr2.jpg|thumb|Garnet]]
  
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for instance m (from your email - the mu did not insert)
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== Synonyms and Related Terms ==
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pyrope (deep red to black); almandine (deep red to black); spessartine (red to brown); grossularite (green); grossular (colorless); carbuncle; andradite (wine red); uvarovite (emerald green); tsavorite (Green); rhodolite (pale red to purple); hessonite (golden); topazolite; demantoid; melanite; Uralian emeralds; Greek anthrax; Granat (Deut.); granate (Esp.); grenat (Fr.); granaat (Ned.); granada (Port.); granatus (Lat.)
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== Other Properties ==
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Isometric crystal system with dodecahedron and trapezohedron habits. 
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Luster = vitreous to resinous.  Fracture = conchoidal or uneven.  Streak = colorless to white
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Fluorescence = none (except green ones which may give weak yellow-orange colors)
  
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µ (from my computer)
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{| class="wikitable"
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|-
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! scope="row"| Mineral
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| Composition
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| Visible color
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| Fluorescent color
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|-
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! scope="row"| Agate
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Apatite
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Barite
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Calcite
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Cerrusite
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Chalcedony
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Corundum
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Dolomite
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Fluorite
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Quartz
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| SiO23
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| colorless to white
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| red
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|-
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! scope="row"| Rhyolite
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Scapolite
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| PbCO3
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| colorless to white
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| yellowish
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|-
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! scope="row"| Willemite
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| PbCO3
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| colorless to white
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| green
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|-
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|}
  
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[[[SliderGallery rightalign|garnetgrossRS.jpg~Raman]]]
  
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: é, è, ô, ñ, ã, ü  (from your email)
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== Additional Information ==
  
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== Synonyms and Related Terms ==
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J. Ogden, ''Jewelry of the Ancient World'', Rizzoli International Publications, New York, 1982.
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== Comparisons ==
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[[media:download_file_171.pdf|Properties of Common Abrasives]]
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[[media:download_file_412.pdf|Properties of Common Gemstones]]
  
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hello
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[[media:download_file_413.pdf|Natural and Simulated Diamonds]]
  
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== Sources Checked for Data in Record ==
 
  
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* Thomas Gregory, ''The Condensed Chemical Dictionary'', Reinhold Publishing, New York, 3rd ed., 1942
 
  
  
  
 
[[Category:Materials database]]
 
[[Category:Materials database]]

Revision as of 13:35, 1 May 2018

21.1213-CR2071-d1.jpg

Description

A family of minerals composed of trisilicates with Aluminum, Iron, Calcium, Magnesium, Manganese, or Chromium. Garnets are found in deposits around the world as transparent crystals embedded in igneous and metamorphic rocks. They have been used as gemstones since antiquity. The ruby red Pyrope and the lighter red Almandine were the most highly prized varieties. The pale rose-purple Rhodolite is a mixture of pyrope and almandine. Garnets are also used as abrasives. The crushed, ground and cleaned garnet is sold as an abrasive powder, coated paper and coated cloth. Garnet particles have sharper cutting edges than aluminum oxide, but are expensive. To decrease costs, some commercially available garnet cloths are actually prepared with quartz. Sources of gem quality garnets include the Czech Republic, South Africa, Australia, China, India, Brazil, Sri Lanka, and the U.S (New York, Maine, Idaho).

Garnet

Synonyms and Related Terms

pyrope (deep red to black); almandine (deep red to black); spessartine (red to brown); grossularite (green); grossular (colorless); carbuncle; andradite (wine red); uvarovite (emerald green); tsavorite (Green); rhodolite (pale red to purple); hessonite (golden); topazolite; demantoid; melanite; Uralian emeralds; Greek anthrax; Granat (Deut.); granate (Esp.); grenat (Fr.); granaat (Ned.); granada (Port.); granatus (Lat.)

Other Properties

Isometric crystal system with dodecahedron and trapezohedron habits.

Luster = vitreous to resinous. Fracture = conchoidal or uneven. Streak = colorless to white

Fluorescence = none (except green ones which may give weak yellow-orange colors)

Mineral Composition Visible color Fluorescent color
Agate PbCO3 colorless to white yellowish
Apatite PbCO3 colorless to white yellowish
Barite PbCO3 colorless to white yellowish
Calcite PbCO3 colorless to white yellowish
Cerrusite PbCO3 colorless to white yellowish
Chalcedony PbCO3 colorless to white yellowish
Corundum PbCO3 colorless to white yellowish
Dolomite PbCO3 colorless to white yellowish
Fluorite PbCO3 colorless to white yellowish
Quartz SiO23 colorless to white red
Rhyolite PbCO3 colorless to white yellowish
Scapolite PbCO3 colorless to white yellowish
Willemite PbCO3 colorless to white green

Raman

GarnetgrossRS.jpg


Additional Information

J. Ogden, Jewelry of the Ancient World, Rizzoli International Publications, New York, 1982.

Comparisons

Properties of Common Abrasives

Properties of Common Gemstones

Natural and Simulated Diamonds

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