TRANS HEX / GEM - SALIENT DATES OF THE PROPOSED SCHEME OF ARRANGEMENT

TRANS HEX GROUP LIMITED
(INCORPORATED IN THE REPUBLIC OF SOUTH AFRICA)
(REGISTRATION NUMBER 1963/007579/06)
("TRANS HEX")
GEM DIAMOND MINING CORPORATION LIMITED
(INCORPORATED IN THE REPUBLIC OF SOUTH AFRICA)
(REGISTRATION NUMBER 1986/004840/06)
("GEM")

SALIENT DATES OF THE PROPOSED SCHEME OF ARRANGEMENT

IT WAS ANNOUNCED IN THE PRESS ON TUESDAY, 14 DECEMBER 1999 THAT TRANS HEX
INTENDED TO PROPOSE A SCHEME OF ARRANGEMENT IN TERMS OF SECTION 311 OF THE
COMPANIES ACT, 1973 (ACT 61 OF 1973), AS AMENDED, BETWEEN GEM AND ITS

SHAREHOLDERS ("SCHEME MEMBERS") ("THE SCHEME"). SHAREHOLDERS OF TRANS HEX AND
GEM ARE ADVISED THAT THE JOHANNESBURG STOCK EXCHANGE ("THE JSE") AND THE
SECURITIES REGULATION PANEL HAVE APPROVED THE CIRCULAR RELATING TO THE SCHEME,
WHICH CIRCULAR WILL BE POSTED TO SHAREHOLDERS OF GEM ON MONDAY, 3 APRIL 2000.
ON TUESDAY, 28 MARCH 2000, THE HIGH COURT OF SOUTH AFRICA (WITWATERSRAND LOCAL
DIVISION) ("THE COURT") GRANTED AN ORDER CONVENING A MEETING OF THE SCHEME
MEMBERS TO BE HELD AT THE GROUND FLOOR AUDITORIUM, 28 HARRISON STREET,
JOHANNESBURG AT 11:00 ON TUESDAY, 25 APRIL 2000 ("THE SCHEME MEETING").
THE SCHEME WILL BE IMPLEMENTED SUBJECT TO APPROVAL BY SCHEME MEMBERS AT THE
SCHEME MEETING, THE SANCTIONING BY THE COURT AND THE REGISTRATION OF THE ORDER
OF COURT BY THE REGISTRAR OF COMPANIES.

THE SALIENT DATES AND TIMES PERTAINING TO THE SCHEME ARE AS FOLLOWS:

                                                           2000

LAST DAY FOR LODGING FORMS OF PROXY FOR THE SCHEME MEETING

BY 11:00 ON (NOTE 1)                                       WEDNESDAY, 19 APRIL
SCHEME MEETING HELD AT 11:00 ON                            TUESDAY, 25 APRIL
COURT HEARING TO SANCTION THE SCHEME ON                    TUESDAY, 9 MAY
RECORD DATE TO DETERMINE PARTICIPATION IN THE SCHEME AT

THE CLOSE OF BUSINESS ON                                   FRIDAY, 12 MAY
EXPECTED DATE OF TERMINATION OF LISTING OF GEM SHARES ON

THE JSE WITH EFFECT FROM THE COMMENCEMENT OF BUSINESS ON   FRIDAY, 12 MAY
EXPECTED OPERATIVE DATE OF THE SCHEME ON                   MONDAY, 15 MAY
LISTING OF TRANS HEX CONSIDERATION SHARES ON THE JSE AND
THE NAMIBIAN STOCK EXCHANGE WITH EFFECT FROM THE

COMMENCEMENT OF BUSINESS ON                                MONDAY, 15 MAY
THE SCHEME CONSIDERATION WILL BE POSTED TO SCHEME MEMBERS
(IF DOCUMENTS OF TITLE ARE RECEIVED PRIOR TO THE
RECORD DATE, FAILING WHICH, WITHIN SEVEN DAYS OF

RECEIPT THEREOF) ON                                        MONDAY, 15 MAY
NOTES:

1. IF A FORM OF PROXY FOR THE SCHEME MEETING IS NOT RECEIVED BY 11:00 ON THIS
DATE IT MAY BE HANDED TO THE CHAIRPERSON OF THE SCHEME MEETING NOT LATER THAN
TEN MINUTES BEFORE THE COMMENCEMENT OF SUCH MEETING, I.E. BY 10:50 ON TUESDAY,
25 APRIL 2000.

2. THE ABOVE DATES AND TIMES ARE SUBJECT TO CHANGE. ANY SUCH CHANGE WILL BE
PUBLISHED IN THE PRESS.

3. TRANSACTIONS IN GEM SHARES ON THE JSE DURING THE WEEK ENDING ON THE RECORD
DATE, WHICH IS EXPECTED TO BE FRIDAY, 12 MAY 2000, WILL BE FOR IMMEDIATE
SETTLEMENT.
JOHANNESBURG
31 MARCH 2000
FINANCIAL ADVISER TO TRANS HEX
DEUTSCHE BANK SECURITIES (SA) (PTY) LIMITED
(REGISTRATION NUMBER 1995/011798/07)
CORPORATE LAW ADVISERS AND CONSULTANTS
EDWARD NATHAN & FRIEDLAND (PTY) LTD
(REGISTRATION NUMBER 1999/026464/07)
MERCHANT BANK TO GEM
BOE MERCHANT BANK
A DIVISION OF BOE BANK LIMITED
CO. REG. NO. 1951/000847/06
ATTORNEYS TO THE SCHEME
BRINK COHEN LE ROUX & ROODT INC ATTORNEYS
(REGISTRATION NUMBER 93/04501/21)
SPONSORING BROKER TO TRANS HEX (IN SOUTH AFRICA)
DEUTSCHE BANK SECURITIES (PTY) LTD
(REGISTRATION NUMBER 1973/006709/07)
MEMBER OF THE JOHANNESBURG STOCK EXCHANGE
SPONSORING BROKER TO TRANS HEX (IN NAMIBIA)
JOLYON IRWIN
MEMBER OF THE NSX
IJG PTY LTD
JOINT SPONSORING BROKERS TO GEM
BOE SECURITIES (PTY) LTD
MEMBER OF THE JOHANNESBURG STOCK EXCHANGE
CO. REG. NO. 1996/015589/07
BARNARD JACOBS MELLET * SECURITIES (PTY) LTD.
MEMBER OF THE JOHANNESBURG STOCK EXCHANGE
(REGISTRATION NUMBER 87/00175/07)