Ladjuar Medam (Lajur Madan; Lapis-lazuli Mine; Lapis-lazuli deposit), Sar-e Sang (Sar Sang; Sary Sang), Koksha Valley (Kokscha Valley; Kokcha Valley), Khash & Kuran Wa Munjan Districts, Badakhshan Province (Badakshan Province; Badahsan Province), Afghanistan
© Christian Bracke
|Colour:||Deep blue, ultramarine, ...||Hardness:||5 - 5½|
|Name:||Lapis-lazuli was known in ancient times and was highly prized. The earliest published use of the name lapis-lazuli appears to be from 1636 by Anselmus Boetus de Boodt in Gemmarum et Lapidum Historia. page 273. The name is said to be derived from the Latin 'Lapis' and the persian 'Lazhward', meaning Blue. The name should be pronounced 'Lap-is Laz-u-lee'|
The name Lapis Lazuli has been used both to describe the blue mineral previously known as lazurite (but in most cases is actually a S-rich variety of Hauyne) and the rock that is made up predominantly of this mineral plus calcite, pyrite and other minerals. In general today the name Lapis Lazuli is used to describe the material used as a decorative stone (ie, the rock) rather than the mineral component. The localities listed here are localities where this decorative stone has been reported.
Many of the properties listed here are for the blue mineral (an opaque sulfur bearing gem Hauyne) in the rock.
Worldwide, virtually all of the lapis-lazuli occurrences have hauyne, vladimirivanovite, afghanite, etc. The species lazurite is actually ultra-rare and virtually no valid specimens are known to contain true lazurite. By far, the greatest number of lapis-lazuli specimens contain hauyne as the deep blue component. Lapis-lazuli is mined and carved as a decorative stone, this rock has a distinctive blue colour. Lapis Lazuli historically came from Lapis-lazuli mines and occurrences, near Sar-e-Sang, Badakhshan (Badakshan; Badahsan) Province, Afghanistan.
Visit gemdat.org for gemological information about Lapis Lazuli. Currently in public beta-test.
Classification of Lapis Lazuli
|IMA status:||Not Approved|
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Occurrences of Lapis Lazuli
|Geological Setting:||In marble skarns|
Physical Properties of Lapis Lazuli
|Comment:||Takes a good polish|
|Colour:||Deep blue, ultramarine, gray blue,|
|Streak:||bright blue, pale blue|
|Hardness (Mohs):||5 - 5½|
|Density (measured):||2.38 - 2.45 g/cm3|
|Density (calculated):||2.41 g/cm3|
Other Names for Lapis Lazuli
|Fluorescence in UV light:||Hauyne may be fluorescent dull orange to pale red in SW due to compositional variation. The traditional blue gem material is not fluorescent|
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
|Industrial Uses:||Decorative stone|
References for Lapis Lazuli
Hogarth, D.D. and Griffin, W.L. (1978) Lapis lazuli from Baffin Island - a Precambrian meta-evaporite. Lithos: 11: 37-60.
Internet Links for Lapis Lazuli
Localities for Lapis Lazuli
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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