30 November 2007 AIM RELEASE KIMBERLEY DIAMOND COMPANY NL (the Company) (AIM: KDC) GEM DIAMONDS AUSTRALIA LIMITED NOTICES OF VARIATION - EXTENSION OF OFFER PERIODS AND LETTER TO SHARE AND OPTION HOLDERS The Company has been served with notices of variation in relation to extension of the share and option offers by Gem Diamonds Australia, lodged with the Australian Securities & Investments Commission, the Australian Securities Exchange and dispatched to Kimberley shareholders and optionholders today. The close periods in respect to the share offer and option offer have been extended to 17 December and 18 December respectively. Copies of the notices are available on the Company's website on www.kimberleydiamondco.com.au. Jean Mathie Company Secretary The Company's Nominated Advisor is RFC Corporate Finance Ltd, contact Steve Allen or Stuart Laing - phone +618 9480 2500. KIMBERLEY DIAMOND COMPANY NL ABN 91 061 899 634 12 WALKER AVENUE WEST PERTH 6005 WESTERN AUSTRALIA PO BOX 806 WEST PERTH WESTERN AUSTRALIA 6872 TEL (+61-8) 9321 5887 FAX (+61-8) 9321 5884 EMAIL general@kimres.com.au WWW www.kimberleydiamondco.com.au END