This is a variation of "419 Scam" dealing with commodities. You will lose your money before seeing anything being delivered over. Such an offer on email is never to be trusted.

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From: john abel [mailto:gold_investors@hotmail.com]
Sent: Friday, August 10
Subject: WE HAVE GOLD DUST FOR SALE

Dear Sir/Madam,
                           
 WE HAVE GOLD DUST FOR SALE

We are so glads to write you this time to introduce our company to you
we are a small skill mining company which we base in Accra (GHANA)we
have a total of eight hundreds kilos (800 kilos) of GOLD DUST in our
storage please if you are intersted kindly inform us immediatly so that we can
send our FCO to you .
Thanks and God bless you ,
Best Regards
Mr john abel