Exercise of option

Red Rock Resources plc
29 May 2007

                             Red Rock Resources plc

                    Exercise of option over mining tenements


Dated: 29 May 2007

Red Rock Resources plc ('Red Rock' or the 'Company'), a mineral exploration and
development company focused on advancing iron ore, uranium and manganese
projects in Australia and East Africa, announces that Jupiter Mines Limited
('Jupiter'), a company listed on the Australian Stock Exchange ('ASX'), has
exercised an option agreement on 28 May 2007 to acquire 100% ownership of both
its Mt Ida and Mt Hope iron ore licenses in the southern Yilgarn region of
Western Australia.

The consideration for the exercise of the options was the payment of AUS$250,000
in cash and AUS$1,000,000 in new Jupiter shares to the Company. The
AUS$1,000,000 of new Jupiter shares is being satisfied by the issue of 4,617,178
new shares in Jupiter (calculated using the volume weighted average price of
Jupiter shares for the 10 days preceding 23 May 2007). Red Rock will in addition
be entitled to a 1.5% royalty on production.

The original consideration for the options (originally granted on 22 May 2006)
was the payment of AUS$40,000 to the Company. The option over Mt Hope was for a
period of 12 months from the date of the Option Agreement, and that over Mt Ida
was for a period of 12 months from the date of final grant of the license.
During the option periods Jupiter was committed to spend a minimum of
AUS$250,000 on exploration.

The Company retains its nearby Mt Alfred license, but Jupiter will for 30 months
(from the date of grant of the original options), should the Company decide to
sell, have the right to match the sale price.

Enquiries:
Andrew Bell      07766 474849     Red Rock Resources plc     Chairman

John Simpson     020 7512 0191    ARM Corporate Finance Ltd  Nominated Adviser

Ron Marshman /
John Greenhalgh  020 7628 5518    City of London PR Limited  Public Relations



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