TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Petra Diamonds Limited

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

X

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

3. Full name of person(s) subject to the notification obligation:

Capital Group International, Inc.

4. Full name of shareholder(s) (if different from 3.):

5. Date of the transaction and date on which the threshold is crossed or reached:

18 December 2009

6. Date on which issuer notified:

21 December 2009

7. Threshold(s) that is/are crossed or reached:

Above 6%

8. Notified details:

A: Voting rights attached to shares

Class/type of
shares

if possible using
the ISIN CODE

Situation previous
to the triggering
transaction

Resulting situation after the triggering transaction

Number
of
Shares

Number
of
Voting
Rights

Number
of shares

Number of voting
rights

% of voting rights

Direct

Indirect

Direct

Indirect

Direct

Indirect

Ord 10p

14,521,452

14,521,452

22,000,000

22,000,000

0.000%

6.2399%

BMG702781094

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial
instrument

Expiration
date

Exercise/ 
Conversion 
Period

Number of voting
rights that may be
acquired if the
instrument is
exercised/ converted.

% of voting
rights

N/A

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial
instrument

Exercise 
price

Expiration 
date

Exercise/
Conversion 
period

Number of voting 
rights instrument 
refers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

22,000,000

6.2399%

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:

Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will cease to hold:

12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:

14. Contact name:

15. Contact telephone number:

Annex Notification of Major Interests in Shares

A: Identity of the person or legal entity subject to the notification obligation

Full name (including legal form for legal entities)

Capital Group International, Inc.

Contact address (registered office for legal entities)

11100 Santa Monica Blvd., 15th Floor Los Angeles, California 90025

Phone number & email

(213) 615-0469

GRGroup@capgroup.com

Other useful information (at least legal representative for legal persons)

B: Identity of the notifier, if applicable

Full name

Gina Martinez

Contact address

11100 Santa Monica Blvd., 15th Floor Los Angeles, California 90025

Phone number & email

(213) 615-0469

Other useful information (e.g. functional relationship with the person or legal entity subject to the notification obligation)

Fax: (213) 486-9698

C: Additional Information

Commencing 20 January 2007, The Capital Group Companies, Inc., no longer reports ownership of securities. Capital Group International, Inc. and Capital Research and Management Company now report relevant holdings separately for the purposes of the new DRT Handbook.