EXHIBIT 5.D


CERTIFICATION OF CHIEF FINANCIAL OFFICER
PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

            Pursuant to 18 U.S.C. 1350, as created by Section 906 of the
Sarbanes-Oxley Act of 2002, the undersigned officer of Northwestern Mineral
Ventures Inc. (the "Company") hereby certifies, to such officer's knowledge,
that:

            (i) the accompanying Annual Report on Form 20-F of the Company for
the fiscal year ended December 31, 2004 (the "Report") fully complies with the
requirements of Section 13(a) or Section 15(d), as applicable, of the Securities
Exchange Act of 1934, as amended; and

            (ii) the information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.


Date: July 15, 2005
                                                        /s/ Errol Farr
                                                        ------------------------
                                                        Errol Farr
                                                        Chief Financial Officer


The foregoing certifications are being furnished solely to accompany the Report
pursuant to 18 U.S.C. 1350, and are not being filed for purposes of Section 18
of the Securities Exchange Act of 1934, as amended, and are not to be
incorporated by reference into any filing of the Company, whether made before or
after the date hereof, regardless of any general incorporation language in such
filing.