Stellar Mining to combine Tongo Kimberlite diamond project with Octea

Update on Potential Transaction

AAStellar Diamonds plc, the London listed diamond development company focused on West Africa, is pleased to announce further details in respect of the potential transaction which was announced on 19 August 2016. Stellar has agreed a proposed transaction with Octea Mining Limited (“Octea”) to combine Stellar’s Tongo kimberlite diamond project with Octea’s adjacent kimberlite diamond project, Tonguma, and to bring both assets into production under the same production infrastructure (the “Potential Transaction”) in Sierra Leone.

The Potential Transaction, if completed, would be classified as a Reverse Takeover under the AIM Rules for Companies and would require the publication of an admission document and also be subject to shareholder approval. Accordingly, trading in the Company’s shares on AIM will remain suspended until either an admission document is published or the Company announces its or Octea’s withdrawal from the Potential Transaction.


  • Combined inferred JORC diamond resource of 5 million carats brought into a single mining operation
  • Diamond grades up to 290 carats per hundred tonne (“cpht”)
  • Average diamond value of US$193 and US$270 per carat for Tonguma and Tongo respectively
  • Exploration target of up to 8 million carats
  • Opportunity presents enhanced production levels and operational margins, when compared with a stand-alone Tongo mining operation
  • No cash acquisition costs to Stellar who will fund and operate the enlarged mine development
  • Stellar to preferentially recoup repayment of development capital prior to paying a royalty and net profit interest to Octea

Stellar’s Chief Executive Karl Smithson commented:

“The Proposed Transaction, if completed, will be transformational for Stellar and its shareholders. Once in production the combined diamond mining operations will be the second largest in West Africa with an estimated maximum output at full production of approximately 250,000 carats per year of high value diamonds. The high grade and high value nature of the kimberlites to be mined are compelling and the combination of operations should provide meaningful cost synergies that will enhance Stellar’s projected operational margins. Using the available infrastructure at Tongo and Tonguma, we expect diamond mining operations to commence within the first 12 months post completion of the Proposed Transaction.”

Octea’s General Manager Christo Swanepoel commented:

“We are very excited to be combining Octea’s Tonguma project with Stellar’s Tongo project and bring the enlarged project into production under Stellar’s operational management. Stellar has long-standing expertise in Sierra Leone and the Tongo region in particular, which we believe will be of great benefit to the project. In addition, the enlarged project should significantly increase local skilled employment for many years to come which in turn will support the local economy as well as generate significant funds for the Sierra Leonean Government.”


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