MICREX DEVELOPMENT CORP.

A mineral exploration and development company operating in Canada and the United States

TSX Venture Exchange symbol "MIX"

For immediate release

Magnetite Order for Water Treatment Application

June 4, 2013 - Micrex Development Corp. (TSX.V : MIX) is pleased to announce that it has received a $2,000,000 order from Chemco Inc. of Saint-Augustin-de-Desmaures, Québec for magnetite to be used for the production of ferric sulphate for water treatment plants. As part of this agreement, Chemco will be working with Micrex on the sale of magnetite for this specialized market throughout eastern Canada and northeastern United States. This comes at the end of a large evaluation program of various magnetite sources, including the St-Charles de Bourget deposit where drilling, testing and assays were conducted. Micrex estimates the market in Canada and the US for magnetite used in the production of ferric sulphate at $10,000,000 annually. Delivery of this order is expected to occur in early 2014.

Micrex is also in discussion with various coal-mining companies for the production of heavy media magnetite used to clean coal, and continues to pursue opportunities for the sale of ilmenite and apatite by-products of the St-Charles magnetite production process.

This press release has been reviewed and approved by Mr Réjean Girard, P.Geo from IOS Services Géoscientifiques Inc., a qualified person for the St. Charles project.

Micrex Development Corp. (TSX.V: MIX) is a mineral exploration company based in Alberta, Canada with mining properties in North America.

Further information may be obtained from Perry Meszaros or S.E. Marshall at (780) 448-0922
or email at mixinfo-1@mixcorp.com

Web site address: www.mixcorp.com

MICREX DEVELOPMENT CORP.

Burmis Magnetite/Titanium Property - St. Charles de Bourget Magnetite/Titanium/Apatite Property - Fort Steel Placer Property - Bighorn Gold Mine - Mount Royal Gold Mine - Deadwood Gold Mine - Sunburst Gold Property

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICE PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS RELEASE.

FORWARD LOOKING STATEMENTS

Certain statements in this news release are "forward-looking statements", which reflect management's expectations regarding its property and business operations. All statements other than statements of historical fact contained in this news release are forward-looking statements. Such forward-looking statements involve risks and uncertainties, as they reflect management's current beliefs and are based on information currently available to management. Actual results may differ materially from those anticipated in the statements made. The forward-looking statements are expressly qualified in their entirety by this cautionary statement. The forward-looking statements are made as of the date of this news release and Micrex assumes no obligation to update or revise them to reflect new events or circumstances except as expressly required by applicable securities law. Further information regarding the uncertainties and risks can be found in the disclosure documents filed by Micrex with the securities regulatory authorities, available at www.sedar.com