SIXTH CLAUSE

ECONOMICAL COMPENSATION

1- CRYSTALLEX shall make to the CORPORATION the following obligatory payments for services rendered:

• Initial Payment: The amount of FIFTEEN MILLION DOLLARS OF THE UNITED STATES OF AMERICA (US$ 15,000,000.00), as eight per cent (8%) of the value of the investments made in the Project, such as: reports, digitalized information, camp, perforations, which payment shall be made by CRYSTALLEX within five (5) working banking days following the granting of the present Contract, subject to previous notification of instructions by the CORPORATION.
  

• Minimum monthly payment for royalty, calculated on the commercial value of the gross monthly production in percentage terms, to be paid upon termination of the construction phase:

Price US$/ Troy Ounce %

Less than 280 $/ounce 1.00

More or equal to 280$/ounce and less than 350$/ounce 1.50

More or equal to 350$/ounce and less than 400$/ounce 2.00

More than 400$/ounce 3.00

7

These royalties are apart from the Exploitation Tax established in the Law of Mines, which will be paid by CRYSTALLEX to the Republic and are subject to revision in accordance to the laws that regulate such matter.

************************************...

I don't know what the exploitation tax rate is but It could be 40% of net.