31.1 (1 oz). BU – Brilliant Uncirculated. This beautiful new black coin issue features the Maple Leaf in gold with all filigree 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. All this together with the luxury box and the noble certificate makes a perfect present and a worldwide searched collectors piece. The coin’s obverse depicts a Maple Leaf Gold gilded and the coin is fully plated in black Ruthenium. On top the inscription “Canada” and on bottom the Silver fineness. On the coin’s reverse the effigy of Her Majesty Queen Elizabeth II, the face value and the issue date. 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. The item “GOLDEN ENIGMA Maple Leaf Black Ruthenium 1 Oz Silver Coin 5$ Dollar Canada 2015″ is in sale since Tuesday, July 28, 2015. This item is in the category “Coins & Paper Money\Coins\ Canada\Commemorative”. The seller is “powercoin_italy” and is located in Roma. This item can be shipped worldwide.
- Circulated/Uncirculated: Uncirculated
- Country/Region of Manufacture: Canada