Turquoise (stone)
The turquoise (of the Italian ) is a decorative stone whose name would come from " hone turque" , since it was more particularly known in Europe at the time of the Croisade S. It gave its name to a nuance of blue. Its opaque aspect and especially its color blue-green are explained by the quantities of copper why it contains. For a long time, she is appreciated and used by the craftsmen and the goldsmiths like hones Gemme. Today, it is competed with by synthetic imitations and substitutes.
Chemical composition:
Layers
The exploitation of turquoise is very old; so much of layers are exhausted today, others still provide some stones.Iran
For at least 2000 years, the old territory of the Perse has remained one of the most important producing areas of the world. One of the oldest layers is that of the mount Ali-mersai, in the current province of the Khorasan.the Sinai
Under the first dynasty of the Pharaon S, and perhaps front, the Egyptians used turquoise and extracted it from the Péninsule of the Sinai. Perhaps the mines of Serabit el-Khadim and Wadi Maghareh represent the oldest mines. Their color is greener than the Iranian stones.the United States
One formerly found much turquoise in the states of the South-west of the United States (Arizona, California Colorado, New Mexico, Nevada). Today, only the site of Apache Canyon in California gives good outputs.Other sources
Another significance
Turquoise is the Couleur of this stone.
See too
- stones and crystals containing of the ions coppers: Pectolite, Malachite, Chrysocolla.
- Hydrophosphate S.
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