Exhibit 23.3

Consent of Independent Registered Public Accounting Firm

Hecla Mining Company

Coeur d’Alene, Idaho

We hereby consent to the incorporation by reference in the proxy statement/prospectus constituting a part of this Registration Statement of our reports dated February 18, 2015, relating to the consolidated financial statements and the effectiveness of Hecla Mining Company’s internal control over financial reporting, which appear in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014.

We also consent to the reference to us under the caption “Experts” in the proxy statement/prospectus.

/s/ BDO USA, LLP

Spokane, WA

April 20, 2015