Kimberlite Drilling Programme

Tertiary Minerals PLC
14 June 2004


                             TERTIARY MINERALS PLC
                                                                    14 JUNE 2004

TERTIARY BEGINS DRILLING DIAMOND TARGET IN FINLAND'S KARELIAN CRATON

   • 16 Hole Programme To Define Kimberlite Footprint Hidden Under Soil Cover
    And Sample For Micro-Diamonds

   • Company Enlarges Finland Diamond Search With Ground Magnetic Survey On
    Additional Kimberlite Target

Tertiary Minerals plc ('the Company') is pleased to announce that it has today
started a drilling programme on its new Finish diamond project and is adding to
its diamond interests within the vicinity.

This follows a recently completed ground geophysical programme that defined the
boundaries of the target magnetic anomaly which, based on previous exploration
reports, is believed to be caused by a small kimberlite pipe.

The programme will include one hole approximately 100m deep which is designed to
confirm the presence of kimberlite and, if successful, collect sufficient
kimberlite for an initial appraisal of micro-diamond content (a initial guide to
diamond prospectivity). A further 15 shallow holes are planned to collect
additional kimberlite and define the footprint of the any kimberlite present
beneath a cover of glacial till. Results from the completed programme should be
known by the beginning of August.

Work also begins today on a ground magnetic survey with the objective of
defining the surface position of a second kimberlite target. This target has a
very similar aeromagnetic signature to the target now being drill tested and was
identified in a regional generative programme which has highlighted a further 19
priority targets.

All of these targets lie within the Karelian Craton, a block of ancient crustal
rocks that dominates Finland's geological make up. The Karelian Craton is
considered to exhibit all the characteristics necessary to host and preserve
diamondiferous kimberlites and extends across the border into Russia where it
hosts the world-class Arkhangelsk diamond deposits (www.gsf.fi/explor/
eco_diamond_frame.htm)

For further information please contact:

Patrick Cheetham, Executive Chairman, Tertiary Minerals plc. Tel: [phone]
Ron Marshman/John Greenhalgh, City of London PR Limited. Tel: [phone]



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