<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2021-09-23</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001866757</issuerCik>
        <issuerName>Brilliant Earth Group, Inc.</issuerName>
        <issuerTradingSymbol>?BRLT?</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001884140</rptOwnerCik>
            <rptOwnerName>Just Rocks, Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BRILLIANT EARTH GROUP, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>300 GRANT AVENUE, THIRD FLOOR</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94108</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class C Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50232863</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Common Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class D Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50232863</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Class C Common Stock will automatically convert into one share of Class B Common Stock upon the earlier of (1) the 10-year anniversary of the date of the closing of the Issuer's Initial Public Offering and (2) the date on which the Reporting Person ceases to hold at least 8% of the aggregate number of shares of all classes of the Issuer's Common Stock then outstanding.</footnote>
        <footnote id="F2">Beth Gerstein and Eric Grossberg are the joint shareholders of Just Rocks, Inc. through various trusts for which they are the trustees and have voting and investment power over.</footnote>
        <footnote id="F3">The Common Units may be redeemed by the Reporting Person at any time on or following the closing of the Initial Public Offering for shares of Class D Common Stock on a 1-to-1 basis, and a corresponding number of shares of Class C Common Stock will be forefeited in connection with the redemption. The Common Units have no expiration date.</footnote>
    </footnotes>

    <remarks>Exhibit 24 - Power of Attorney.</remarks>

    <ownerSignature>
        <signatureName>/s/ Jeffrey Kuo as Attorney-in-fact for Eric Grossberg, the President of Just Rocks, Inc.</signatureName>
        <signatureDate>2021-09-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
