Shear Minerals Ltd.
TSX VENTURE : SRM

Shear Minerals Ltd.

December 03, 2007 09:03 ET

Shear Recovers 337 Carats From 356 Tonne Kahuna Bulk Sample

11,088 diamonds liberated from 356 dry tones for an overall diamond recovery of 0.95 carats per tonne

EDMONTON, ALBERTA--(Marketwire - Dec. 3, 2007) - Shear Minerals Ltd. (TSX VENTURE:SRM) and Stornoway Diamond Corporation (TSX:SWY) today announced that processing of the mini bulk sample from the Kahuna kimberlite at the Churchill Diamond Project in Nunavut is complete with 11,088 diamonds greater than 0.85 mm recovered from a total sample of 356 dry tonnes for an overall diamond grade of 0.95 carats per tonne.

The mini bulk sample, collected earlier this year, yielded 337 carats of diamonds with preliminary observation describing the majority as white and colorless. The five largest stones were 5.44, 2.05, 1.54, 1.44 and 1.32 carats. Several of the larger stones are interpreted to be broken fragments of a larger diamond estimated to have been up to 14 carats in weight.

"With these final results, overall grade has risen and we recovered large diamonds," says Shear President and CEO Pamela Strand. "This 337 carat parcel provides us with a more representative sample of the Kahuna diamond population that will be used to estimate a preliminary diamond value early in 2008. The results from that exercise will help determine the next steps for Kahuna and the continued evaluation of the Churchill diamond project."

Today's diamond results are from three spatially separate surface samples collected by trenching along the Kahuna kimberlite dyke in March and April of 2007. Sample grades are based on diamonds recovered on a 0.85mm sieve size or larger (using a square mesh). The Kahuna kimberlite is a 2.8m to 4m wide vertical kimberlite dyke that trends for more than 5.5km based on geophysical interpretation.



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Diamond Weight of
Sample Recovery Diamonds
Weight Carats per Recovered Number
Sample Dry tonne (carats) of stones
Number (tonnes) (+0.85mm) (+0.85mm) +0.85 mm
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Kahuna -
Sample 1(1) 98.13 1.03 100.80 3,582
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Kahuna -
Sample 3(2) 151.63 0.94 142.35 4,267
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Kahuna -
Sample 2(3) 106.57 0.88 93.54 3,239
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Total
Kahuna 356.33 0.95 336.69 11,088
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Sample 0.85 mm 1.18 mm 1.70 mm 2.36 mm 3.35 mm 4.75 mm 6.70
Number Sieve Sieve Sieve Sieve Sieve Sieve Sieve
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Kahuna -
Sample 1(1) 1,737 1,528 263 48 6 0 0
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Kahuna -
Sample 3(2) 2,015 1,850 302 76 20 3 1
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Kahuna -
Sample 2(3) 1,609 1,374 203 40 13 0 0
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Total
Kahuna 5,499 4,772 773 165 39 3 1
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(1) Largest diamond 0.98 carats
(2) Largest diamonds 5.44, 2.05, 1.54, 1.44, and 1.32 carats; as reported
in November 14, 2007 news release
(3) Largest diamonds 1.39, 1.19 and 0.73 carats; as reported in
September 8, 2007 news release


Sample results are based on the recovery of diamonds by dense media separation (DMS) at Kennecott Canada Exploration Inc.'s independent processing plant in Thunder Bay, ON, using a 1mm square mesh bottom cut off. Kahuna Samples 1 and 3 were crushed; Sample 2 required no crushing as the kimberlite was pervasively clay altered. A 135kg and 672.8kg heavy mineral concentrate was generated from Samples 1 and 3 respectively and then passed through an x-ray sorter and picked for diamonds. Diamonds were also recovered during an audit of the magnetic fractions and x-ray rejects resulting in the treatment of these fractions by caustic fusion analysis.

The Churchill Diamond Project is owned 58.14% by Shear and 41.86% by Stornoway and is comprised of the diamond rights to more than two million acres located near the communities of Rankin Inlet and Chesterfield Inlet in the Kivalliq region of Nunavut. Work is presently focused on continued exploration of new promising indicator mineral trains and geophysical anomalies as well as the evaluation of four significantly diamond-bearing, vertically-emplaced kimberlite dykes that have returned sample grades of up to 2.18 carats per tonne. The 2007 field program is under the supervision of Jennifer Burgess, P. Geol., a Qualified Person under NI 43-101.

On behalf of the Board

SHEAR MINERALS LTD.

Pamela Strand, P. Geol., President

On behalf of the Board

STORNOWAY DIAMOND CORPORATION

Eira Thomas, Chief Executive Officer

This news release may contain forward looking statements, being statements which are not historical facts, including, without limitation, statements regarding potential mineralization, exploration results, resource or reserve estimates, anticipated production or results, sales, revenues, costs, "best-efforts" financings or discussions of future plans and objectives. There can be no assurance that such statements will prove accurate. Such statements are necessarily based upon a number of estimates and assumptions that are subject to numerous risks and uncertainties that could cause actual results and future events to differ materially from those anticipated or projected. Important factors that could cause actual results to differ materially from either of the Companies' expectations are in Company documents filed from time to time with the TSX or the TSX Venture Exchange and provincial securities regulators, most of which are available at www.sedar.com. The Companies disclaim any intention or obligation to revise or update such statements.

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

Contact Information

  • Shear Minerals Ltd.
    Pamela Strand, P. Geol.
    President
    (780) 435-0045 or Toll Free: 1-866-298-9695
    Website: www.shearminerals.com
    or
    Stornoway Diamond Corporation
    Eira Thomas
    Chief Executive Officer
    (604) 331-2271 or Toll Free: 1-877-331-2232
    Website: www.stornowaydiamonds.com