SOURCE: Trivalence Mining Corporation

March 16, 2005 13:41 ET

Recovery of Diamonds From Botswana Kimberlite

VANCOUVER, BC -- (MARKET WIRE) -- March 16, 2005 -- TRIVALENCE MINING CORPORATION (the "Company") (TSX-V: TMI) (OTC BB: TMIGF) has been informed by its joint venture partner, Rio Tinto Mining and Exploration Ltd., that it has recovered a number of small diamonds from a kimberlite pipe in the Kokong Joint Venture Project, Botswana.

The joint venture agreement allows Rio Tinto to fund and manage the diamond exploration program in Kokong, Botswana. Rio Tinto has discovered 39 kimberlites in addition to 32 previously discovered pipes. Majority of these pipes were tested with a single 5 1/2" RC hole. Material from these holes was submitted to Rio Tinto's Polokwane diamond laboratory for recovery of indicator minerals and diamonds.

Material from kimberlite K295 returned 19 small diamonds from RC chips. These chips represent the interval from 77m to End of Hole at 134m. The picked samples represent some 1800 kg of in situ material. The K295 is a large conductive anomaly defined through an airborne Time Domain Electromagnetic Survey flown in late 2004. The actual size of the pipe is as yet unknown.

Rio Tinto regards the results as encouraging but not conclusive. It is planned to drill a core hole close to the initial RC hole and to perform fusion for microdiamonds on the core to allow a provisional assessment of the pipe's potential. Results from this work should be available by mid April 2005.

Trivalence Mining Corporation is a publicly traded company with two producing diamond mines located in the Republic of Guinea, West Africa, and in the Republic of South Africa. In addition to its mining operations, the Company has an advanced kimberlite exploration programs currently underway in the Republic of Botswana. Exploration of the Botswana property is being conducted by the Company's joint venture participant, Rio Tinto Mining and Exploration Ltd.

Dr. Waseem Rahman
The Company relies upon litigation protection for "forward-looking" statements. The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this Release.

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