Austria: Latest coin in popular Silver Niobium series rolls out in June

May 7, 2017 in Austrian Coins, Coins, Coins for sale, Collecting, Collector Sets, New Releases, News, Numismatica, Numismatics, World Coins

By: Coin Update (Coin Update News)

On June 7, 2017, the Austrian Mint will release “Mikrokosmos” (Microcosm), the newest in its extremely popular Silver Niobium series. Inaugurated in 2003, the bimetallic €25 coins have consistently sold out at the mint, and all—especially the first few issues—have gained value on the secondary market.

Each year’s issue is composed of a disc of niobium surrounded by a .900 silver outer ring. The brilliant colors of the disc are achieved by anodic oxidation—a precisely controlled electrochemical process that deposits a fine layer of oxidized niobium on the surface of the disc. The color is determined by the thickness of… Full article at the source>

Source: (Coin Update News)

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