EXHIBIT 99.4


                         NOTICE OF GUARANTEED DELIVERY

                                      FOR

                           TENDER OF ALL OUTSTANDING
                    13% SENIOR SUBORDINATED NOTES DUE 2009

                                IN EXCHANGE FOR

                  NEW 13% SENIOR SUBORDINATED NOTES DUE 2009

                                      OF

                    BETTER MINERALS AND AGGREGATES COMPANY

   Registered holders of outstanding 13% Senior Subordinated Notes due 2009
(the "Old Notes") who wish to tender their Old Notes in exchange for a like
principal amount of new 13% Senior Subordinated Notes due 2009 (the "New
Notes") and whose Old Notes are not immediately available or who cannot
deliver their Old Notes or the Letter of Transmittal (or any other required
documents) to The Bank of New York (the "Exchange Agent") prior to the
Expiration Date, may use this Notice of Guaranteed Delivery or one
substantially equivalent hereto. This Notice of Guaranteed Delivery may be
delivered by hand or sent by facsimile transmission (receipt confirmed by
telephone and an original delivered by guaranteed overnight courier) or mail
to the Exchange Agent. See "The Exchange Offer--Procedures for Tendering" in
the Prospectus dated [       ], 2000 of the Better Minerals and Aggregates
Company (the "Prospectus").

                 The Exchange Agent for the Exchange Offer is:

                             THE BANK OF NEW YORK

     For Overnight Delivery, Delivery by Hand or Delivery by Registered or
                                Certified Mail:

                             The Bank of New York
                                101 Barclay St.
                              New York, NY 10286
                       Attention: Kim Lau, Reorg-7 EAST

                           By Facsimile Transmission
                       (for eligible institutions only):

                                (212) 815-6339

                     Confirm facsimile by telephone only:

                                (212) 815-3750


   DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE OR TRANSMISSION VIA A FACSIMILE TRANSMISSION TO A NUMBER OTHER
THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.

   This Notice of Guaranteed Delivery is not to be used to guarantee
signatures. If a signature on a Letter of Transmittal is required to be
guaranteed by an eligible institution (as defined in the Prospectus), such
signature guarantee must appear in the applicable space provided on the Letter
of Transmittal for Guarantee of Signatures.

Ladies and Gentlemen:

   The undersigned hereby tenders for exchange to the Issuer, upon the terms
and subject to the conditions set forth in the Prospectus and the Letter of
Transmittal, receipt of which is hereby acknowledged, the principal amount of
Old Notes set forth below pursuant to the guaranteed delivery procedures set
forth in the Prospectus under the caption "The Exchange Offer--Guaranteed
Delivery Procedures."

   The undersigned understands and acknowledges that the Exchange Offer will
expire at 5:00 p.m., New York City time, on           , 2000, unless extended
by the Issuer. The term "Expiration Date" shall mean 5:00 p.m., New York City
time, on           , 2000 unless the Exchange Offer is extended as provided in
the Prospectus, in which case the term "Expiration Date" shall mean the latest
date and time to which the Exchange Offer is extended.

   All authority conferred or agreed to be conferred by this Notice of
Guaranteed Delivery shall survive the death, incapacity or dissolution of the
undersigned, and every obligation of the undersigned under this Notice of
Guaranteed Delivery shall be binding upon the undersigned's heirs, personal
representatives, successors and assigns.

                                   SIGNATURE

- -------------------------------------------  Date: ____________________________

- -------------------------------------------  Date: ____________________________

              (Signature(s) of Holder(s) or Authorized Signatory)

Area Code and Telephone Number:

- -------------------------------------------------------------------------------

Name(s):

- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------
                                (Please Print)


Capacity (full title), if signing in a fiduciary or representative capacity:

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

Address:

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

Taxpayer Identification or Social Security No.:

- --------------------------------------------------------------------------------

Principal Amount of Old Notes Tendered (must be in integral multiples of
$1,000):

- --------------------------------------------------------------------------------

Certificate Number(s) of Old Notes (if available):

- --------------------------------------------------------------------------------

Aggregate Principal Amount Represented by Certificate(s):

- --------------------------------------------------------------------------------

IF OLD NOTES WILL BE TENDERED BY BOOK-ENTRY TRANSFER, PROVIDE THE FOLLOWING
INFORMATION:

DTC Account Number:

- --------------------------------------------------------------------------------

Transaction Number:

- --------------------------------------------------------------------------------


                             GUARANTEE OF DELIVERY
                   (NOT TO BE USED FOR SIGNATURE GUARANTEE)

   The undersigned, a member of a recognized signature guarantee medallion
program within the meaning of Rule 17Ad-15 under the Securities Exchange Act
of 1934, as amended, hereby guarantees to deliver to the Exchange Agent at one
of its addresses set forth on the reverse hereof, the certificates
representing the Old Notes (or a confirmation of book-entry transfer of such
Old Notes into the Exchange Agent's account at the book-entry transfer
facility), together with a properly completed and duly executed Letter of
Transmittal (or facsimile thereof), with any required signature guarantees,
and any other documents required by the Letter of Transmittal within three New
York Stock Exchange trading days after the Expiration Date (as defined in the
Letter of Transmittal).

Name of Firm:
           --------------------------------------   ---------------------------
                                                      (Authorized Signature)
Address:         ________________________________
    ------------------------------------------      Title:
                                                        -----------------------
                                                    Name:
- --------------------------------------------------        ---------------------
(Zip Code)                                             Please Type or Print

Area Code and                                        Date: ____________________
Telephone No.:
            -------------------------------------

NOTE: DO NOT SEND OLD NOTES WITH THIS NOTICE OF GUARANTEED DELIVERY. OLD NOTES
      SHOULD BE SENT WITH YOUR LETTER OF TRANSMITTAL.