looking to buy platinum crucibles


I am looking to buy 2 platinum crucibles, one 50 ml and one 100 ml capacity. I would appreciate any help in refering companies you bought them from. Also is it better to buy Ptas pure as possible or better with alloying elements like 10% Rh which improves its strenght? Is anybody willing to sell used crucibles? I am gonna use them for glass melting purposes. Thanks in advance,Paul

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