DON Diamonex

    Notice of change of interests of substantial holder
             



AIM RELEASE
5 August 2008


CHANGE OF INTERESTS OF SUBSTANTIAL HOLDER

JP Morgan Chase & Co have notified ASX Limited ("ASX") of changes in
their shareholdings in DiamonEx Limited ("DON").  The following is a
summary of the changes notified:


+------------------------------------------------------------------------------+
|    Shareholder    | Notified Previously  |       Present        | Reason For |
|                   |----------------------+----------------------|   Change   |
|                   |Number of |Ownership %|Number of |Ownership %|            |
|                   |  Shares  |           |  Shares  |           |            |
|-------------------+----------+-----------+----------+-----------+------------|
|                   |          |           |          |           |            |
|-------------------+----------+-----------+----------+-----------+------------|
|JP Morgan Chase &  |14,600,000|   9.80%   |13,633,000|   8.77%   |Sell        |
|Co.                |          |           |          |           |Transactions|
+------------------------------------------------------------------------------+



For further information, contact:

Dan O'Neill (Managing Director)            Greg King (Chairman)
+61 7 37208944 (Office)                              +61 7 37208944
(Office)
+61 7 37208988 (Fax)                                  +61 7 37208988
(Fax)
+61 407596942  (Mobile)                              +61 411473730
(Mobile)
diamonex@diamonex.com.au (Email)           diamonex@diamonex.com.au
(Email)


Will Souter                                                Richard
Hail
RFC Corporate Finance Ltd (Nomad)           Fox-Davies Capital Ltd
(AIM Broker)
Tel: +612 9250 0050                                     Telephone:
+44(0) 20 7936 5200
Email: will.souter@rfc.com.au                      Email:
Richard.Hail@fdcap.com


About DiamonEx

DiamonEx is a Brisbane, Australia-based specialist diamond company
developing a 330,000 carat per year diamond mine based on an
established 3.7 million carat resource at Lerala in eastern Botswana,
within an area that produces 35% of the world's diamonds by value.
J.P. Morgan Asset Management is the company's largest shareholder.
DiamonEx is listed on the Australian Securities Exchange (ASX), the
Botswana Stock Exchange (BSE) and the Alternative Investment Market
(AIM) in London.

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