April 27, 2005

SUNRISE DIAMONDS OFFER TO TERTIARY SHAREHOLDERS CLOSES OVERSUBSCRIBED

• Further Fundraising Begins In Preparation For AIM Admission

AIM-listed Tertiary Minerals plc says the offer for subscription by its Sunrise Diamonds plc subsidiary of 30m ordinary shares at 1p each has been oversubscribed. Entitlements and allocations will be made next week. Proceeds of the subscription offer, designed as a seed-corn opportunity for Tertiary shareholders, will be used for working capital and to meet costs of a planned listing by Sunrise on AIM.

Sunrise , as previously announced by the company, will carry out a further fund raising following closure of the shareholder offer and prior to AIM admission. This is being co-ordinated by the company’s brokers WH Ireland. The additional funds will be applied to exploration of the company’s wholly owned diamond interests in Finland including three kimberlites intersected last year and 45 untested targets – all in the Kuusamo area of the Karelian Craton.

Further info: Patrick Cheetham, Executive Chairman, Tertiary Minerals plc.
Tel: 01625-626203

John Greenhalgh/Ron Marshman, City of London PR Ltd.
Tel: 0207-628 5518

Laurie Beevers, WH Ireland.
Tel: 0161 832 2174