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AZURITE +MALACHITE SPECIMEN FROM MOROCCO 18.65 CTS [MX6240]

SKU
Dimensions (mm)
x x mm
Weight (cts)
Certified Gemstones
No
Type
Rough
Colours

AZURITE MALACHITE SPECIMEN

This is a specimen showing the strong blue colours  azurite with the green of malachite.Ideal collectors specimen.

Weight  18.65 cts

Size 20 x 15 x 10 mm app

Azurite is a soft, deep blue copper mineral produced by weathering of copper ore deposits. It is also known as Chessylite after the Chessy-les-Mines near Lyon, France, where striking specimens have been found. The mineral has been known since ancient times. The blue of azurite is exceptionally deep and clear, and for that reason the mineral has tended to be associated since antiquity with the deep blue color of low-humidity desert and winter skies. 

Pigments

Azurite was used as a blue pigmentfor centuries. Depending on the degree of fineness to which it was ground, and its basic content of copper carbonate, it gave a wide range of blues. It has been known as mountain blue or Armenian stone, in addition it was formerly known as Azurro Della Magna (from Italian). When mixed with oil it turns slightly green. When mixed with egg yolk it turns green-grey. It is also known by the names Blue Bice and Blue Verditer. Older examples of azurite pigment may show a more greenish tint due to weathering into malachite. Much azurite was mislabeled lapis lazuli, a term applied to many blue pigments. As chemical analysis of paintings from the Middle Agesimproves, azurite is being recognized as a major source of the blues used by medieval painters. True lapis lazuli was chiefly supplied from Afghanistan during the Middle Ages while azurite was a common mineral in Europe at the time.

 

Collecting

The intense color of azurite makes it popular collector's stone. However, bright light, heat, and open air all tend to reduce the intensity of its color over time. To help preserve the deep blue color of a pristine azurite specimen, collectors should use a cool, dark, sealed storage environment similar to that of its original natural setting.

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Rest of the world
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mineralgemworld
mineralgemworld
MEMBER OF THE [ICA]  INTERNATIONAL COLOURED STONE ASSOCIATION AND PRESIDENT OF THE OPAL ASSOCIATION. We have a retail shop/museum at the Gold Coast Opal and Gem Centre 25 surfers av mermaid waters Qld Australia .4218 open mon to sat 10 to 5
Surfers Paradise, Australia
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Bids History (1)
jinesh25
Purchased from this seller previously
6 years ago
$11.00

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Shipping Details

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$16.00 21 days via Registered Shipping
Ships from:
Australia

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Overview

Listing Type : Standard
Product ID : 170494
Starting Bid : $11
Starts : 27th August 2017 06:02 pm AEST
Ends : 2nd September 2017 01:16 am AEST
* All prices are in USD