Exhibit 8.1

	Loeb & Loeb Llp
	345 Park Avenue New York, NY 10154	Main Fax	+1 212-407-4000 +1 212-407-4990

June 22, 2026

Texas Mineral Resources Corp.

Ladies and Gentlemen:

We have acted as United States counsel to Texas Mineral Resources Corp., a Delaware corporation (“TMRC”), in connection with the proposed Mergers (as defined below) contemplated by an agreement and plan of merger made and entered into on March 4, 2026 (the “Merger Agreement”) by and among TMRC, USA Rare Earth, Inc., a Delaware corporation (“USAR”), Hamer Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of USAR (“First Merger Sub”) and Hamer Merger Sub, LLC, a Delaware limited liability company and a wholly owned subsidiary of USAR (“Second Merger Sub” and together with First Merger Sub, the “Merger Subs”). The Merger Agreement provides for the successive mergers of TMRC with each of the Merger Subs in accordance with the Delaware General Corporation Law (the “Mergers”), as a result of which TMRC’s business will be held by a wholly owned subsidiary of USAR, and each of the then outstanding shares of common stock of TMRC will generally be exchanged for newly issued shares of common stock of USAR.

The Mergers and certain other related transactions are described in the Registration Statement of USA Rare Earth, Inc., on Form S-4 under the Securities Act of 1933, as amended (the “Securities Act”), initially filed on May 13, 2026 (Registration Number 333-295838), as amended through the date hereof (the “Registration Statement”).

In rendering this opinion, we have reviewed and relied upon the Merger Agreement, the Registration Statement, the tax representation letters delivered to us by each of TMRC and USAR, and such other documents as we have considered relevant to our analysis, including exhibits, schedules, and attachments to the foregoing documents. In examining such documents, we have assumed the authenticity of all documents submitted to us as originals, the conformity to original documents of all documents submitted to us as copies, and the completeness and accuracy of the documents reviewed by us. We have assumed with your approval and have not verified the accuracy of the factual matters and representations set forth in the Registration Statement, the Merger Agreement, and the tax representation letters delivered to us.

Based upon and subject to the foregoing (including the representations made by each of TMRC and USAR) and the assumptions, exceptions, limitations, and qualifications set forth herein and in the Registration Statement and other customary assumptions, we hereby confirm and adopt as our opinion the statements of United States federal income tax law on the date hereof as set forth in the Registration Statement under the caption “—Certain Material U.S. Federal Income Tax Considerations of the Mergers” insofar as they address the material U.S. federal income tax considerations of the Mergers for beneficial owners of TMRC Shares (as defined in the Registration Statement) and discuss matters of U.S. federal income tax law and regulations or legal conclusions with respect thereto, and except to the extent stated otherwise therein, are our opinion, subject to the assumptions, qualifications, and limitations stated herein and therein. Statements contained therein, however, that USAR or TMRC “believes,” “expects,” “intends,” “assumes,” or other similar phrases are not legal conclusions and do not constitute our opinion.

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For the United States offices, a limited liability partnership including professional corporations. For Hong Kong office, a limited liability partnership.

Texas Mineral Resources Corp.
June 22, 2026
Page 2

This opinion is based upon the existing provisions of the Internal Revenue Code of 1986, as amended, Treasury Regulations promulgated thereunder, published revenue rulings and procedures from the United States Internal Revenue Service (“IRS”) and judicial decisions, all as in effect on the date hereof. Any such authority is subject to change, and any change may be retroactive in effect and may affect our opinion as set forth herein. Our opinion is based on the facts, assumptions and representations set forth in the Registration Statement and as described above. If any of the facts, assumptions or representations is not true, correct or complete, our opinion may not be applicable. We undertake no responsibility to update this opinion or to advise you of any developments or changes as a result of a change in legal authority, fact, representation, assumption or document, or any inaccuracy in any fact, representation or assumption, upon which this opinion is based, or otherwise.

Our opinion is not binding on the IRS or a court. The IRS may disagree with one or more of our conclusions, and a court may sustain the IRS’s position.

We hereby consent to the filing of this letter as an exhibit to the Registration Statement and to the reference to this firm as counsel to Texas Mineral Resources Corp. under the captions “—Certain Material U.S. Federal Income Tax Considerations of the Mergers” in the Registration Statement, without implying or admitting that we are “experts” within the meaning of the Securities Act or the rules and regulations promulgated thereunder, with respect to any part of the Registration Statement, including this exhibit.

Regards,

/s/ Loeb and Loeb LLP

Loeb and Loeb LLP