Joinder Agreement dated November 6, 2023, by and between RCF Acquisition Corp. and Perception Partners IV LLC

Exhibit 10.1

JOINDER AGREEMENT

This Joinder Agreement (this “Joinder Agreement”) is made as of the date written below by Perception Partners IV LLC, a Delaware limited liability company (the “Buyer”) in accordance with Section 5.2 of that certain Registration Rights Agreement, dated as of November 9, 2021 (the “RRA”) by and among RCF Acquisition Corp., a Cayman Islands exempted company (the “Company”), RCF VII Sponsor LLC, a Delaware limited liability company (the “Sponsor”) and each of the other parties listed on the signature pages thereto as “Holders”. Capitalized terms used but not defined herein shall have the meanings given to such terms in the RRA.

Buyer, as a Permitted Transferee in accordance with Section 5.2 of the RRA, has acquired from Sponsor an aggregate of 1,673,750 Founder Shares and 9,067,500 Private Placement Warrants, pursuant to that certain Securities Purchase Agreement, dated as of November 2, 2023, by and between the Sponsor and the Buyer.

Buyer and the Company each hereby acknowledges, agrees and confirms that, by the execution of this Joinder Agreement, Buyer shall be deemed to be a party to, and a “Holder” under, the RRA as of the date hereof and shall be entitled to all of the rights, benefits, privileges, terms, conditions and covenants of the RRA in the same manner as if Buyer was an original signatory to the RRA. Buyer hereby ratifies, as of the date hereof, and agrees to be bound by, all of the terms, provisions, and conditions, representations and warranties contained in the RRA.

November 6, 2023

[Signature Page to Joinder Agreement]