Tantalum
Element (Ta), Atomic No. 73, density 16.6 kg/litre, M.Pt 2996°C
First isolated in 1802 by Ekeberg.
A hard blue-coloured metal with a very high melting point. Too expensive and difficult to work for regular coinage, but once again Fred Zinkann has made a medal in this material.
Some fantasy coins for the Islas Malvinas (Falkland Islands) are known, as is a bimetallic silver-tantalum coin from Kazakhstan
Thanks to ukcoinpics
Yes, I have little to say at the moment.
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