Exhibit 23.4

  

 

Independent Registered Public Accounting Firm’s Consent

 

We consent to the inclusion in this Registration Statement of NioCorp Developments Ltd.’s Amendment No. 4 to Form S-4 (FILE NO. 333-268227) of our report dated March 25, 2022, which includes an explanatory paragraph as to GX Acquisition Corp. II’s ability to continue as a going concern with respect to our audits of the financial statements of GX Acquisition Corp. II as of December 31, 2021 and 2020, and for the year ended December 31, 2021 and for the period from September 24, 2020 (inception) through December 31, 2020, which report appears in the Prospectus, which is part of this Registration Statement. We also consent to the reference to our Firm under the heading “Experts” in such Prospectus.

 

 

/s/ Marcum llp

 

Marcum llp

New York, NY

February 6, 2023