Black Rock Mining Ltd's (ASX:BKT) chairman, Stephen Copulos, has once again increased his stake in the company through an on-market purchase.
Copulos purchased another 1 million shares for a consideration of $101,800.00, and he now holds circa 72.5 million shares, and various lines of options.
Black Rock shares last traded at $0.115, more than double their value from just a month ago.
Recently the company achieved more 99% purity metallurgical test results as part of the ongoing process optimisation program at the Mahenge graphite project in Tanzania.
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