Block Admission and Block Admission Return

Name of company:

Petra Diamonds Limited

Name of scheme:

Petra Diamonds Limited 2005 Share Option Plan

Period of return:

From 18 March 2010 to 17 September 2010

Number of shares not issued under scheme at the end of the last period:

3,071,000

Number of shares issued under scheme during period:

233,862

Number of shares cancelled under the scheme during period:

0

Balance under scheme not yet issued at end of period:

2,837,138

Number and class of shares admitted under scheme and the date of admission:

100,000 (14 June 2007)

3,000,000 (22 March 2010)

Cathy Roberts

Telephone: +44 20 7318 0452

Petra Diamonds, London

[email protected]

Bobby Morse / Katharine Sutton

Telephone: +44 20 7466 5000

Buchanan Communications

[email protected]

[email protected]

Ryan Gaffney / Andrew Chubb

Telephone: +44 20 7050 6500

Canaccord Genuity Limited

(NOMAD and Joint Broker)

[email protected]

[email protected]

Joshua Critchley / Martin Eales

Telephone: +44 20 7653 4000

RBC Capital Markets

(Joint Broker)

[email protected]

[email protected]