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Initial Tongo kimberlite processing yields 107cpht

12th February 2014

By: Leandi Kolver

Creamer Media Deputy Editor

  

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JOHANNESBURG (miningweekly.com) – Initial sample processing at Aim-listed Stellar Diamonds’ 1.1-million-carat Tongo dyke kimberlite project, in Sierra Leone, confirmed the resource’s continued high-grade nature, with grades expected to increase further as more diamonds were recovered following reprocessing, Stellar CE Karl Smithson said on Wednesday.

Initial processing yielded 151 ct from 141 t of kimberlite for a grade of 107 carats per hundred tons (cpht), while in future this was expected to increase in line with the 120 cpht level established in previous results.

“The quality of diamonds observed in these bulk sample results at Tongo is outstanding, with an estimated 86% being classified as gem quality, with many white diamonds exhibiting fine crystal shapes,” Smithson added.

Bulk sampling at the project was ongoing with 772 t collected to date, as part of the Dyke-1 mining definitive feasibility study (DFS), with the objective to recover a minimum 1 000 ct parcel for diamond grade and value confirmation.

“Extraction and processing of the kimberlite bulk sample will form part of our DFS for underground mining at Tongo, which is on track for delivery in the second half of 2014.  We look forward to announcing further bulk sampling results from Tongo in the coming months,” Smithson said.

Once the DFS was completed a production decision would be taken at Tongo.

The company would also be working towards defining an at least three-million-carat resource from its newly acquired Baoulé joint venture kimberlite pipe, in Guinea, Smithson said.

Edited by Tracy Hancock
Creamer Media Contributing Editor

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