Difference between revisions of "Lapis Lazuli"

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(Added Enhancements)
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* Fracture filling - wax (with dye or withou) - conceal cracks and fractures and to improve luster
 
* Fracture filling - wax (with dye or withou) - conceal cracks and fractures and to improve luster
 
* Dye - color staining - to produce evenly colored material
 
* Dye - color staining - to produce evenly colored material
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==Images==
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[[Image:Lapis Afghanistan.jpg|left|200px|thumb|Untreated lapis lazuli cabochon from Afghanistan.<br />Image courtesy of Scott Davies.]]
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Latest revision as of 00:26, 21 May 2008

Lapis Lazuli
Chemical composition rock consisting of lazurite, hauyne, calcite and pyrite
Habit aggregate
Fracture uneven
Hardness 5.5
Refractive index 1.500 - 1.670
Specific gravity 2.50 - 3.00
Lustre resinous to vitreous
Lapis Lazuli with Pyrite inclusions

Enhancements

Common enhancements to lapis lazuli:

  • Fracture filling - wax (with dye or withou) - conceal cracks and fractures and to improve luster
  • Dye - color staining - to produce evenly colored material

Images

Untreated lapis lazuli cabochon from Afghanistan.
Image courtesy of Scott Davies.