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OR - PLATA - GOLD - SILVER
45.8
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85.5
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December 27, 2012
December 27, 2012
Importància econòmica del or
L'existència d'or natiu i la seva mal·leabilitat foren la causa que aquest fos el primer metall utilitzat per l'home; en el transcurs del neolític aparegué l'orfebreria i es produïren els joiells, les figures i els vasos trobats a Ur, Micenes, etc. En el segon mil·lenni aC, l'or començà a competir amb el coure o l'argent com a patró de valor.
http://www.enciclopedia.cat/fitxa_v2.jsp?NDCHEC=0127976&BATE=or
Economic importance of gold
The existence of native gold and its malleability were the cause that was the first metal used by man during the Neolithic appeared jewelry and gems are produced, figures and vessels found Ur, Mycenae, etc.. In the second millennium BC, gold began to compete with copper or silver as a standard of value
http://www.enciclopedia.cat/fitxa_v2.jsp?NDCHEC=0127976
- Camera Nikon D80
- Focal Length 18mm
- Shutter Speed 1/160 sec
- Aperture f/6.3
- ISO 200
- Category Uncategorized
- Uploaded 6 months ago
- Copyright Rossend Gri
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bon cap de setmana
v&f
HAPPY NEW YEAR TO YOU TOO.............
voted
i bon bn
* Voted.
Saludos Rossend :)