Stornoway Completes Renard 65 Bulk Sample Field Program

MONTREAL, QUEBEC -- (Marketwire) -- 11/21/12 -- Stornoway Diamond Corporation (TSX: SWY) is pleased to announce that it has completed the field portion of a bulk sample program on the Renard 65 Kimberlite pipe, located at Stornoway's 100% owned Renard Diamond Project in north-central Quebec. The program was announced in a press release dated July 23, 2012.

The objective of the bulk sample program is to collect a large enough parcel of diamonds to allow the conversion of material that is currently classified as an Inferred Mineral Resource at Renard 65 to an Indicated Mineral Resource and then, if warranted, to a Mineral Reserve. Sampling commenced in July with the objective of collecting five thousand tonnes from a surface trench through blasting. Following the trenching, a sample of approximately 5,147 dry tonnes of kimberlite from Renard 65 was processed at the 10 tonne per hour Dense Media Sample plant located at the Renard project site. A heavy mineral concentrate produced by the plant will now undergo final diamond recovery at Stornoway's North Vancouver lab facilities. Diamond results are expected in Q1 2013. Given the estimated diamond content at the sampling site, it is expected that approximately 1,000 carats of diamonds will be recovered, which will be sent to Antwerp, Belgium for valuation.

Matt Manson, President and CEO, commented: "We are pleased that trenching and processing of the Renard 65 bulk sample has progressed so well to date. Although Renard 65 is lower grade than the other four kimberlites contained within the Renard Mineral Resource, it is the largest pipe discovered to date at Renard and is amenable to large scale open-pit mining. The successful conversion of Inferred Mineral Resources at Renard 65 to a Mineral Reserve will allow us to plan for an expanded processing rate and an extension of the reserve mine life beyond the current 11 years. This is all expected to add value to the project."

In November 2011, Stornoway released the first National Instrument ("NI") 43-101 compliant Mineral Reserve estimate for Renard of 18.0 Mcarats (representing 23.0 million tonnes at an average grade of 78 carats per hundred tonnes, or "cpht") at a weighted average diamond valuation of US$180/carat. The project's Inferred Mineral Resources comprise an additional 17.5 Mcarats (31.1 Mtonnes at an average grade of 56 cpht), and targets for further exploration outside of the Mineral Resource statement have been estimated at between 23.5 and 48.5 Mcarats (55.1 to 75.5 Mtonnes at grades ranging from 23 to 188 cpht). Within this resource inventory, Renard 65 contains an Inferred Mineral Resource of 3.7 Mcarats (representing 12.9 mtonnes at an average grade of 29 cpht) to a depth of 290m, with an exploration potential estimated at between 6.8 and 13.7 Mcarats (29.5 to 41.6 Mtonnes at between 23 and 33 cpht) from 290m to 775m in depth. All kimberlites remain open at depth.

The reader is cautioned that mineral resources that are not mineral reserves do not have demonstrated economic viability. In addition, the potential quantity and grade of any exploration target is conceptual in nature, and it is uncertain if further exploration will result in it being delineated as a mineral resource.

Qualified Persons

Mr. David Skelton, P.Geo. (QC), P.Geol (AB), Vice President, Project Development for Stornoway is a Qualified Person as defined under National Instrument 43-101 and was responsible for supervising the Renard 65 bulk sample program on the Renard Diamond Project. Mr. Skelton has reviewed and approved the scientific and technical information contained in this release.

About the Renard Diamond Project

The Renard Diamond Project is located approximately 250 km north of the Cree community of Mistissini and 350 km north of Chibougamau in the James Bay region of North-Central Quebec. In November 2011, Stornoway released the results of a Feasibility Study for Renard that highlighted the potential of the project to become a significant producer of high value rough diamonds over a long mine life. NI 43-101 compliant Probable Mineral Reserves stand at 18.0 million carats, with a further 17.5 million carats classified as Inferred Mineral Resources, and 23.5 to 48.5 million carats classified as non-resource exploration upside. All kimberlites remain open at depth. Pre-production capital cost stands at an estimated C$802 million, with a life of mine operating cost of C$54.71/tonne giving a 68% operating margin over an initial 11 year mine life. Readers are referred to the technical report dated December 29, 2011 in respect of the Renard Diamond Project for further details and assumptions relating to the project.

About Stornoway Diamond Corporation

Stornoway is a leading Canadian diamond exploration and development company listed on the Toronto Stock Exchange under the symbol SWY. Our flagship asset is the 100% owned Renard Diamond Project, on track to becoming Quebec's first diamond mine. Stornoway also maintains an active diamond exploration program with both advanced and grassroots programs in the most prospective regions of Canada. Stornoway is a growth oriented company with a world class asset, in one of the world's best mining jurisdictions, in one of the world's great mining businesses.

On behalf of the Board

STORNOWAY DIAMOND CORPORATION

Matt Manson, President and Chief Executive Officer

This press release contains "forward-looking information" within the meaning of Canadian securities legislation and "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995. This information and these statements, referred to herein as "forward-looking statements", are made as of the date of this press release and the Company does not intend, and does not assume any obligation, to update these forward-looking statements, except as required by law.

Forward-looking statements relate to future events or future performance and reflect current expectations or beliefs regarding future events and include, but are not limited to, statements with respect to: (i) the amount of mineral resources and exploration targets; (ii) the amount of future production over any period; (iii) net present value and internal rates of return of the mining operation; (iv) assumptions relating to capital costs, operating costs and other cost metrics set out in the Feasibility Study; (v) assumptions relating to gross revenues, operating cash flow and other revenue metrics set out in the Feasibility Study; (vi) assumptions relating to recovered grade, average ore recovery and other mining parameters set out in the Feasibility Study; (vii) mine expansion potential and expected mine life; (viii) expected time frames for completion of permitting and regulatory approvals and making a production decision; (ix) the expected time frames for delivery of a winter road by the Quebec Ministere des Transports, construction of a mining grade road by Stornoway and completion generally of the Route 167 extension and the financial obligations or costs incurred by Stornoway in connection with such road extension; (x) future exploration plans; (xi) future market prices for rough diamonds; and (xii) sources of and anticipated financing requirements. Any statements that express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as "expects", "anticipates", "plans", "projects", "estimates", "assumes", "intends", "strategy", "goals", "objectives" or variations thereof or stating that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved, or the negative of any of these terms and similar expressions) are not statements of historical fact and may be forward-looking statements.

Forward-looking statements are made based upon certain assumptions by Stornoway or its consultants and other important factors that, if untrue, could cause the actual results, performances or achievements of Stornoway to be materially different from future results, performances or achievements expressed or implied by such statements. Such statements and information are based on numerous assumptions regarding present and future business strategies and the environment in which Stornoway will operate in the future, including the price of diamonds, anticipated costs and ability to achieve goals. Certain important factors that could cause actual results, performances or achievements to differ materially from those in the forward-looking statements include, but are not limited to: (i) estimated approval date of the Environmental and Social Impact Assessment; (ii) required capital investment and estimated workforce requirements; (iii) estimates of net present value and internal rates of return; (iv) receipt of regulatory approvals on acceptable terms within commonly experienced time frames; (v) the assumption that a production decision will be made, and that decision will be positive; (vi) anticipated timelines for the commencement of mine production; (vii) anticipated timelines related to the delivery of a winter road by the Quebec Ministere des Transports, construction of a mining grade road by Stornoway and completion generally of the Route 167 extension and the impact on the development schedule at Renard; (viii) anticipated timelines for community consultations and the impact of those consultations on the regulatory approval process; (ix) market prices for rough diamonds and the potential impact on the Renard Project's value; and (x) future exploration plans and objectives.

By their very nature, forward-looking statements involve inherent risks and uncertainties, both general and specific, and risks exist that estimates, forecasts, projections and other forward-looking statements will not be achieved or that assumptions do not reflect future experience. We caution readers not to place undue reliance on these forward-looking statements as a number of important risk factors could cause the actual outcomes to differ materially from the beliefs, plans, objectives, expectations, anticipations, estimates, assumptions and intentions expressed in such forward-looking statements. These risk factors may be generally stated as the risk that the assumptions and estimates expressed above do not occur, including the assumption in many forward-looking statements that other forward-looking statements will be correct, but specifically include, without limitation, (i) risks relating to variations in the grade, kimberlite lithologies and country rock content within the material identified as mineral resources from that predicted; (ii) variations in rates of recovery and breakage; (iii) the greater uncertainty of exploration targets; (iv) developments in world diamond markets; (v) slower increases in diamond valuations than assumed; (vi) risks relating to fluctuations in the Canadian dollar and other currencies relative to the US dollar; (vii) increases in the costs of proposed capital and operating expenditures; (viii) increases in financing costs or adverse changes to the terms of available financing if any; (ix) tax rates or royalties being greater than assumed; (x) results of exploration in areas of potential expansion of resources; (xi) changes in development or mining plans due to changes in other factors or exploration results of Stornoway; (xii) changes in project parameters as plans continue to be refined; (xiii) risks relating to receipt of regulatory approvals or the implementation of the existing Impact and Benefits Agreement with aboriginal communities; (xiv) the effects of competition in the markets in which Stornoway operates; (xv) operational and infrastructure risks; (xvi) technical, environmental, permitting and execution risk relating to the construction by Stornoway of a mining grade road forming part of the Route 167 extension, (xvii) weather conditions or other unpredictable events which may impact the construction or planned availability of a winter road by March 2013; and (xviii) the additional risks described in Stornoway's most recently filed Annual Information Form, annual and interim MD&A, and Stornoway's anticipation of and success in managing the foregoing risks. Stornoway cautions that the foregoing list of factors that may affect future results is not exhaustive.

When relying on our forward-looking statements to make decisions with respect to Stornoway, investors and others should carefully consider the foregoing factors and other uncertainties and potential events. Stornoway does not undertake to update any forward-looking statement, whether written or oral, that may be made from time to time by Stornoway or on our behalf, except as required by law.

Contacts:

Stornoway Diamond Corporation

Matt Manson

President and CEO

416-304-1026


Stornoway Diamond Corporation

Nick Thomas

Manager Investor Relations

604-983-7754 or Toll Free: 1-877-331-2232


Stornoway Diamond Corporation

M. Ghislain Poirier

Vice-president Affaires publiques de Stornoway

418-780-3938


Stornoway Diamond Corporation
info@stornowaydiamonds.com
www.stornowaydiamonds.com