Benas Posted January 21, 2009 Posted January 21, 2009 For sale rare bimetallic silver / tantalum coin from Kazakhstan:Kazakhstan 500 Tenge "1st space setallite of Earth" 2007 proofBIMETALLIC: inner disk is made of Tantalum, external ring is made of Silver.Total weight 41,4 gr. Fineness: 925 Silver, 14,6 gr. / Tantalum 38,61 gr.Mintage 4000 pcs only !!!!!!!!!PRICE ............ 140.00 USDOther dealers and collectors sell this coin more expensiv. Please compare: http://global.ebay.com/gbh/viItem?ItemId=130212103277Tantalum is a chemical element with the symbol Ta and atomic number 73. A rare, hard, blue-grey, lustrous, transition metal, tantalum is highly corrosion-resistant and occurs naturally in the mineral tantalite, always together with the chemical similar niobium. The chemical inertnes of tantalum made it a valuble substance for laboratory equipment and substitute for platinum, but its main use today is in tantalum capacitors. If you interested in this coin please let me know.
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