GOLDEN ENIGMA Walking Liberty Black Ruthenium 1 Oz Moneda Plata 1$ Dollar US Mint 2016

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This beautiful new black coin features the Walking Liberty in Gold with many details. The coin is completely plated with Ruthenium and partly with pure Gold. The precious metal Ruthenium is a member of the Platinum Group and worldwide very rare. The coin comes in an attractive box, along with the Certificate of Authenticity. Limited mintage to 5.000 pieces worldwide.

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69.95 €

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Disponible a partir de (Puede cambiar): 06/09/16
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Específicas
País Estados Unidos
Año 2016
Valor Facial 1 Dólar
Metal Plata
Finura 999/1000
Peso (g) 31.1 (1 oz)
Diámetro (mm) 40.6
Calidad BU - Brilliant Uncirculated
Tirada (uds) 5.000
Certificado de Autenticidad
Caja
 
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Ruthenium and Platinum Group
Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. The Baltic German scientist Karl Ernst Claus discovered the element in 1844, and named it after Ruthenia, the Latin word for Rus'. Ruthenium usually occurs as a minor component of platinum ores; annual production is about 20 tonnes. Most ruthenium produced is used for wear-resistant electrical contacts and the production of thick-film resistors. A minor application of ruthenium is its use in some platinum alloys.
The platinum-group metals (abbreviated as the PGMs; alternatively, the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group elements (PGEs)) is a term used sometimes to collectively refer to six metallic elements clustered together in the periodic table. These elements are all transition metals, lying in the d-block (groups 8, 9, and 10, periods 5 and 6).
The six platinum-group metals are ruthenium, rhodium, palladium, osmium, iridium, and platinum. They have similar physical and chemical properties, and tend to occur together in the same mineral deposits. However they can be further subdivided into the iridium-group platinum-group elements (IPGEs: Os, Ir, Ru) and the palladium-group platinum-group elements (PPGEs: Rh, Pt, Pd) based on their behaviour in geological systems.

 
Design
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