Texas Gas Discovery

Aminex PLC
01 June 2005

Aminex PLC

Texas Gas Discovery

Aminex PLC ("Aminex"), the oil and gas company listed in London and Dublin,
today announces that its GU#35 well in the South Weslaco field, Hidalgo County,
Texas, has reached target depth and has been declared a commercial gas
discovery. The well will be completed for production when equipment is
available, probably at the end of June.  Detailed well results will be released
in due course, subject to partner approval.

Partners are Aminex USA, Inc (25%), Activa Resources LLC (25%) and Stalker
Energy LP (50%) (operator).

Aminex Chief Executive, Brian Hall commented:

"This successful well is the first in a series of gas development wells planned
on our US properties for 2005 aimed at boosting production and accelerating
revenues."

                                                                     1 June 2005

Enquiries:

Aminex PLC
    Brian Hall                        [phone]

College Hill
    Jim Joseph                        [phone]




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