Arctic Star Diamond Corp.
TSX VENTURE : ADD

Arctic Star Diamond Corp.
Tres-Or Resources Ltd.
TSX VENTURE : TRS

Tres-Or Resources Ltd.

May 12, 2005 13:43 ET

Arctic Star and Tres-Or to Drill Temagami North Properties, Ontario

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - May 12, 2005) - Arctic Star Diamond Corp. ("Arctic Star") (TSX VENTURE:ADD) and Tres-Or Resources Limited ("Tres-Or") (TSX VENTURE:TRS) are pleased to announce mobilization of a drill rig to the Temagami North claims to drill test a series of prominent pipe-like geophysical and indicator mineral anomalies, in the vicinity of New Liskeard, Ontario.

The first target (Lapointe 1) is considered particularly promising. Lapointe 1 is a large coincident magnetic, electromagnetic, and indicator mineral target that appears to be comprised of two coalescing lobes. The magnetic anomaly covers 20 hectares at the surface and is crossed by a stream and characterized by low-lying topography. In December 2004, Tres-Or commissioned an Aero TEM survey (a helicopter-borne magnetic and time domain EM system) that covered the target. This survey revealed that the larger western lobe is coincident with a well defined EM anomaly (slightly displaced to the north), and that the eastern lobe has no significant EM response. Orientation surveys over known kimberlites in the region demonstrate a combined magnetic EM response from the Aero TEM system over some but not all of the bodies. Till samples collected 200 m to 1.2 km down-ice of Lapointe 1 returned high counts of kimberlite indicator minerals (KIM's) upwards of 343 indicator minerals in the nearer sample. (SGS-Lakefield Laboratory stopped recovery of pyropes and chromites in the fine fraction at 100 grains apiece).

An image showing the anomaly and the associated KIM results can been seen on our websites at http://www.arcticstardiamond.com and http://www.tres-or.com.

The combination of large size, high KIM counts, magnetic signature and EM signature makes the Lapointe 1 an excellent start to the drill campaign that will test a number of similar magnetic anomalies in the area. This region of Ontario has long been the focus of diamond exploration, with kimberlites being first discovered in the area by Lac Minerals and DeBeers in the early 1980's. Recently the diamond-bearing 95-2 kimberlite was bulk sampled by Contact Diamond Corp., in the area south of Lapointe 1.

The geophysical work was supervised by Christopher Campbell, a consulting Geophysicist for Tres-Or who has over 20 years experience. The geological and geochemical work was supervised by Dr. Harrison Cookenboo a consulting geologist with over 20 years experience predominantly in diamond exploration. Both Mr. Campbell and Dr. Cookenboo spent considerable time on the property during the first exploration phase and can be considered as Qualified Persons as defined by NI 43-101.

Arctic Star and Tres-Or recently entered into an agreement on the Temagami North claims, (see news release dated May 2, 2005) and Arctic Star is funding this portion of the exploration program as part of its commitment.

ON BEHALF OF THE BOARD OF DIRECTORS OF ARCTIC STAR DIAMOND CORP.

Patrick Power, President

ON BEHALF OF THE BOARD OF DIRECTORS OF TRES-OR RESOURCES LTD.

Laura Lee Duffett, President


The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.

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