Petra Diamonds Regulatory News (PDL)

Petra Diamonds Limited

("Petra" or the "Company" or the "Group")

Recovery of a 122.52 carat Blue Diamond at Cullinan

Petra Diamonds Limited announces the recovery of an exceptional 122.52 carat blue diamond at the Cullinan mine in South Africa.

The stone will require further analysis in order to assess its potential value and upon completion of this process, Petra will be in a position to evaluate its optimal route to market. The diamond will therefore not be sold before the end of the Company's current financial year (30 June 2014).

The rarity of a blue diamond of this magnitude sets it apart as a truly significant find. Cullinan is known as the world's most important source of blue diamonds and since Petra acquired the mine in 2008, it has continued to produce a number of exceptional blues (see the 'Notes to Editors' for further information).

Photos of the 122.52 carat blue can be viewed at the Company's website:

 www.petradiamonds.com and www.petradiamonds.com/media/image-library/diamonds.

For further information, please contact:

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Notes to Editors:

About Petra Diamonds Limited

Petra Diamonds is a leading independent diamond mining group and an increasingly important supplier of rough diamonds to the international market. The Company has interests in six producing mines: five in South Africa (Finsch, Cullinan, Koffiefontein, Kimberley Underground and Helam) and one in Tanzania (Williamson). It also maintains an exploration programme in Botswana.

Petra offers an exceptional growth profile, with a core objective to steadily increase annual production to 5 million carats by FY 2019. The Group has a major resource base in excess of 300 million carats.

Petra conducts all operations according to the highest ethical standards and will only operate in countries which are members of the Kimberley Process. Petra is quoted with a premium listing on the Main Market of the London Stock Exchange under the ticker 'PDL' and is a member of the FTSE 250.

For more information, visit the Company's website at www.petradiamonds.com.

About the Cullinan mine

Located at the foothills of the Magaliesberg mountain range, 37 kilometres north-east of Pretoria in South Africa, Cullinan is one of the world's most celebrated diamond mines.

It earned its place in history with the discovery of the Cullinan diamond in 1905, the largest rough gem diamond ever found at 3,106 carats. This iconic stone was cut into the two most important diamonds which form part of the Crown Jewels in the Tower of London - the First Star of Africa, which is mounted at the top of the Sovereign's Sceptre and which at 530 carats is the largest flawless cut diamond in the world, and the Second Star of Africa, a 317 carat polished diamond which forms the centrepiece of the Imperial State Crown.

Cullinan is renowned as a source of large diamonds and frequently yields diamonds larger than 10 carats. Furthermore, it has produced over 750 stones weighing more than 100 carats, 130 stones weighing more than 200 carats, and around a quarter of all diamonds weighing more than 400 carats.

Cullinan is also renowned as the world's most important source of blue diamonds, providing the collection of 11 rare blues displayed in 2000 at London's Millennium Dome alongside the Millennium Star and which included the fancy vivid blue 'Heart of Eternity' (27 carats polished).

Since Petra acquired the mine in 2008, it has produced the following important blue diamonds:

· A 39.9 carat diamond which sold for US$8.8 million (or US$220,551 per carat) in 2008.

· A 26.6 carat diamond which yielded a fancy vivid blue and internally flawless 7.0 carat polished stone. Sold for US$9.49 million (or US$1.35 million per carat) at a Sotheby's auction in 2009, at the time this was the highest price per carat for any gemstone sold at auction and the highest price for a fancy vivid blue diamond sold at auction. It was subsequently named the 'Star of Josephine' by its new owner.

· A 25.5 carat diamond which sold for US$16.9 million (or US$663,144 per carat) in 2013.

· A 29.6 carat diamond which sold for US$25.6 million (or US$862,780 per carat) in February 2014.

Other notable diamonds historically produced from Cullinan include the Premier Rose (353 carats rough), the Niarchos (426 carats rough), the De Beers Centenary (599 carats rough), the Golden Jubilee (755 carats rough) and the famous Taylor-Burton diamond (69 carats polished). More recently, the Cullinan Heritage (507 carats rough) was recovered by Petra and sold for US$35.3 million in February 2010, being the highest price on record for a rough diamond.

About blue diamonds

Blue diamonds are one of nature's most special treasures. They are so rare that there are no official statistics on their recovery, however the Cullinan mine in South Africa is known as the world's most important source.

The natural blue colour is derived from small amounts of the chemical element boron trapped in the crystal carbon structure during their formation. Virtually every blue diamond described by the GIA Gem Trade Laboratory as "blue" is classified as a Type IIb diamond.

The hue of coloured diamonds is graded in two ways. The first factor considered is the stone's basic colour, i.e. blue, pink, yellow etc. The second factor is the colour's intensity; usually the more intense the colour, the rarer and more expensive a diamond will be. The intensity of the colour saturation grade ranges from 'fancy vivid' to 'faint'.

The incredible rarity of blue diamonds, along with the rich history associated with many of the more important stones, has made them one of the world's most highly valuable and collectable items.

There have been a number of prominent coloured diamond sales over the last six months, including the "Winston Blue", a pear-shaped 13.22 carat stone and the largest flawless vivid blue diamond in the world, which was sold for US$23.8 million by Christie's in May 2014, setting a world auction record of US$1.8 million per carat for a blue diamond. This sets apart blue diamonds as one of the most highly concentrated forms of wealth known to man.