Greystar Resources to Study Viability of Alternate Project at Angostura

TIDMGSL

Greystar Resources to Study Viability of Alternate Project at Angostura
FOR: GREYSTAR RESOURCES LTD.

TSX, AIM SYMBOL: GSL

March 18, 2011

VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 18, 2011) - Greystar Resources Ltd. (the "Company")
(TSX:GSL)(AIM:GSL) today clarified that it does not intend to withdraw from its Angostura Project
("the Project") but will study the viability of alternative options for the project and continue to
proceed with evaluating the entire project while working jointly with the Ministry of Environment,
Housing and Territorial Development as well as the Ministry of Mines and Energy of Colombia in
resolving any outstanding issues.

Comments made yesterday could be incorrectly interpreted to mean that Greystar is fully withdrawing
from the Project, but the intent is simply to desist from on-going environmental licensing to allow
for a future re-filing in the terms that reflect concerns.

"We are committed to developing the project but recognize that there is a need to reconfigure it.
Consequently, we intend to continue with studies into the feasibility of an alternate project at
Angostura whilst the uncertainty surrounding the definition of Paramo and the exclusion of mining from
Paramo affects the permitting of our open pit/heap leach project," the Company said. "Additionally, we
are committed to the reclamation of all areas affected by the Project and to develop a biodiversity
offset program. We believe that the oxide resource can be developed with open pit mining whilst
preserving biodiversity and water quality. In due course, when legislation is resolved regarding the
definition of Paramo, this Project can contribute significantly to regional economic development and
employment."

The Company further said that it decided to take this course of action after it became evident that
regional and national government and the community of Bucaramanga did not support the Project as
configured. The controversy on the project led to the early termination of the second Public Hearing
in Bucaramanga on 4th March 2011. The Company wants to ensure that the future filing reflects the many
concerns that have been presented and that this will allow it to have a social license to operate
sustainably.

Over the course of the past few months the Company has completed a Preliminary Economic Evaluation of
an underground operation that targets the high grade resource at Angostura. Most of these resources
were contained within the shell of the open pit. Mineable resources were estimated at 14 million
tonnes at 5.34 g/t gold and 29.6 g/t silver. A mining rate of 4,000 tpd and flotation plant operation
of 3,300 tpd are envisaged which after a ramp up of one year, would produce approximately 200,000
oz/year gold over the first seven years before production declines owing to resource constraints. A
high grade drilling program is planned to extend the underground resource base which has considerable
potential. Over a 14 year initial project life, gold production is estimated at 2 million oz gold and
8 million oz silver. Production costs are estimated at US$395/oz gold after silver credits. The
initial capital cost is estimated at US$352 million. At a long term gold price of US$1015/oz gold and
US$15.85/oz silver, the pre-tax NPV (5%) is US$412 million and the IRR 20%.

Steve Kesler, President and CEO, commented: "We appreciate the hard work and efforts of all who are
supportive of our desire to bring financially viable and environmentally sustainable mining operations
to the California district, city of Bucaramanga and to the surrounding metropolitan area. We
understand there are concerns about the open pit project and protection of the Paramo and respect the
concerns of Government and communities. We have arranged to meet with the Minister of Mines and Energy
and the Minister of Environment, Housing and Territorial Development early next week to discuss how
the open pit project can be modified to meet concerns and to present our proposal to proceed with an
underground project. Clearly there will be a delay to anticipated first production compared with the
proposed open pit project, but we shall work rapidly to advance the next phase of study and drilling
to extend and improve the categorization of high grade underground resources. Our recently appointed
COO, David Heugh, has extensive experience of underground gold mining from his career with Anglo
American to bring to this effort. We want to work with the Government of Colombia in making this a
project that will demonstrate our commitment, diligence and respect for communities and the
environment."

The Company will complete all necessary steps to ensure that its Project will not affect the quality
of the water supply to the town of Bucaramanga, the surrounding metropolitan area, or the North Soto
Province. The Company will also maintain its efforts to keep citizens fully informed about the
proposed mining projects and continue to foster an understanding that responsible mining can bring
considerable economic and social benefits, not only to the region, but to the country as a whole.

The above information has been reviewed and approved by Mr. Rodrigo Mello, Senior Geologist, a
"qualified person" as that term is defined in National Instrument 43-101 and Guidance Note for Mining,
Oil and Gas Companies issued by the London Stock Exchange in respect of AIM companies, which outline
standards of disclosure of mineral projects. Mr. Mellow is a geologist with more than 36 years of
industry experience and is a member in good standing with the Australian Institute of Mining and
Metallurgy.

Forward-Looking Statements

Certain statements in this news release are "forward-looking" within the meaning of Canadian
securities legislation. They include statements about the estimated annual production from the
Angostura Project. Forward-looking statements are necessarily based upon a number of estimates and
assumptions that, while considered reasonable by the Company, are inherently subject to significant
business, economic, competitive, political and social uncertainties and other contingencies. Many
factors could cause the Company's actual results to differ materially from those expressed or implied
in the forward-looking statements. These factors include, among others, conclusions or realization of
mineral resources, the actual results of exploration activities, possible variations in ore grade or
recovery rates, fluctuations in the price of gold and silver, risks relating to additional funding
requirements, political and foreign risks, production risks, environmental regulation and liability,
government regulation as well as other risk factors set out under the heading "Risk Factors" in the
Annual Information Form dated March 26, 2010 which is available on SEDAR at www.sedar.com. Investors
are cautioned not to put undue reliance on forward-looking statements due to the inherent uncertainty
therein.

-30-

FOR FURTHER INFORMATION PLEASE CONTACT:

Greystar Resources Ltd.
Victoria Vargas
Vice President Investor Relations & Corporate Communications
+1 (416) 572 2139 or +1 (289) 242 3599
ir@greystarresources.com
www.greystarresources.com

Renmark Financial Communications Inc.
John Boidman
Investor Relations Contact
+1 514 939 3989 or +1 416 644 2020
jboidman@renmarkfinancial.com
www.renmarkfinancial.com

4C Communications
Carina Corbett
Investor Relations Contact
+44 (0)20 3170 7973
corbett@4ccommunications.com

NCB Stockbroker Ltd.
Christopher Caldwell
London NOMAD Contact
+44 (0) 20 7071 5200
Christopher.caldwell@ncb.ie

Neither the Toronto Stock Exchange nor the AIM Market of the London Stock Exchange has reviewed and
neither accepts responsibility for the adequacy or accuracy of this news release.

Greystar Resources Ltd.

Greystar (LSE:GSL)
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