Micrex Development Corp.: Update on the St. Charles Quebec Magnetite/Rare Earth Property

Micrex Development Corp. (TSX VENTURE:MIX) announces an update on the St.
Charles Quebec Magnetite/Rare Earth/Titanium/Apatite/Vanadium deposit.


As previously reported on February 15th, 2011, Micrex has retained lab services
at McGill University, Montreal, Quebec, to test for the Bond Index of Magnetite.
The lab has since completed a Bond Index grinding test on samples from the St.
Charles property and has yielded very satisfactory results. This test will aid
in the completion of the Company's 43-101 report, which is in the process of
being prepared.


Micrex has requested the McGill lab do a series of processes to make a pure form
of magnetite, referred to as heavy media, for primary usage in the water
purification and metallurgical coal industries. Micrex estimates the market for
these two applications alone at 150,000 tons per year. Currently all of this
domestic magnetite demand is being met with imports from Europe and South
America.


Micrex is in discussions with a large international company and has been asked
to deliver the material that has been processed by McGill for independent
testing at their laboratory in the USA. This material has been delivered and
results are pending.


Micrex has also received expressions of interest in its secondary minerals such
as rare earths, titanium, vanadium and apatite, from multiple international
mining conglomerates. The McGill lab will test further and assay the remaining
fractions to confirm concentrations levels of: rare earths, titanium, vanadium
and apatite. Test results will be announced soon after completion.


Micrex Development Corp. (TSX VENUTRE:MIX) is a mineral exploration company
based in Alberta, Canada with mining properties in North America. Current focus
is on the St. Charles de Bourget magnetite / rare earth property in Quebec. 


Visit www.mixcorp.com for further details. 

This press release has been reviewed by M. Rejean Girard, geologist and head
director of IOS Services Geoscientifiques Inc. and the Company's Qualified
Person for this project under the meaning of NI 43-101.


MICREX DEVELOPMENT CORP.

Burmis Magnetite/Titanium Property - St. Charles de Bourget
Magnetite/Titanium/Rare Earth Property - Fort Steele Placer Property - Bighorn
Gold Mine - Banks Gold Mine - Mount Royal Gold Mine - Deadwood Gold Mine -
Sunburst Gold Property


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.


SEC 12 g (3) Exemption 82-4281