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The diamond recovery process at Mothae involves separating heavy mineral concentrate into various size fractions and then passing this material over a continuous grease belt recovery system. All tailings from the grease belt are retained on site in a secure area. Hand sorting of a limited number of audit samples of grease belt tailings has demonstrated that a number of diamonds are not being recovered in this process. As a result, all grease belt tailings is reprocessed using an alternative technique in order to complete the recovery process and more reliably establish diamond grades.
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