Silverstone Shareholders Approve Arrangement With Silver Wheaton

VANCOUVER, BRITISH COLUMBIA, May 19 (MARKET WIRE) --
Silverstone Resources Corp. ("Silverstone") (TSX VENTURE: SST) is pleased
to announce that Silverstone's shareholders have approved the previously
announced acquisition of Silverstone by Silver Wheaton Corp. ("Silver
Wheaton") by way of plan of arrangement under the Business Corporations
Act (British Columbia) (the "Arrangement"). At the special meeting of
Silverstone shareholders held today, the Arrangement was approved by
74.67% of the votes cast by the Silverstone shareholders.

Pursuant to the Arrangement, Silver Wheaton will acquire all of the
issued and outstanding common shares of Silverstone at an exchange ratio
of 0.185 of a Silver Wheaton common share for each Silverstone common
share. The closing of the Arrangement remains subject to final court
approval, which Silverstone intends to seek from the British Columbia
Supreme Court on May 20, 2009. Subject to court approval being obtained
and the other conditions to closing being satisfied or waived, the
Arrangement is expected to be effective on May 21, 2009.

Silverstone has received a notice from one Silverstone shareholder
purporting to exercise dissent rights in respect of the Arrangement, in
respect of 8,705,500 Silverstone common shares, representing
approximately 7% of the issued and outstanding common shares of
Silverstone. Completion of the Arrangement is subject to a condition in
favour of Silver Wheaton that holders of no more than 5% of the
Silverstone common shares exercise dissent rights. Silver Wheaton has
indicated its intention to waive this condition and complete the
Arrangement.

Further details regarding the terms of the Arrangement are set out in
Silverstone's management information circular dated April 16, 2009, which
is available at www.sedar.com.

CAUTIONARY NOTE REGARDING FORWARD LOOKING-STATEMENTS

This news release contains certain "forward-looking information" under
applicable Canadian and United States securities laws concerning the
proposed acquisition of Silverstone by Silver Wheaton. Forward-looking
statements are based on the opinions and estimates of management at the
date the statements are made, and are based on a number of assumptions
and subject to a variety of risks and uncertainties and other factors
that could cause actual events or results to differ materially from those
projected in the forward-looking statements. Assumptions upon which
forward-looking statements related to the proposed acquisition by Silver
Wheaton of Silverstone include that the British Columbia Supreme Court
will approve the plan of arrangement, that all other required third party
regulatory and governmental approvals to the plan of arrangement will be
obtained and all other conditions to completion of the plan of
arrangement involving Silver Wheaton and Silverstone will be satisfied or
waived. Many of these assumptions are based on factors and events that
are not within the control of Silverstone and there is no assurance they
will prove to be correct. Silverstone is under no obligation to update
forward-looking statements if circumstances or management's estimates or
opinions should change except as required by applicable securities laws.
The reader is cautioned not to place undue reliance of forward-looking
statements.

Contacts:
Silverstone Resources Corp.
Mark Patchett
Investor Relations
604.637.8151
604.688.2180 (FAX)
mpatchett@silverstonecorp.com
www.silverstonecorp.com

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