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Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-290111), and Form S-8 (Nos. 333-259736, 333-266807, 333-270725, 333-278351 and 333-285801) of Brilliant Earth Group, Inc. of our report dated March 17, 2026, relating to the consolidated financial statements, which appears in this Annual Report on Form 10-K.

/s/ BDO USA, P.C.

Denver, Colorado

March 17, 2026