Black Rock Mining (ASX:BKT) has had three members of its board purchase shares in the company by way of on-market trades dated last Friday 12 May 2017.
Stephen Copulos purchased 1 million shares for $74,407 increasing his holding to 91.8 million shares.
John de Vries purchased 150,000 shares for $10,500 increasing his holding to 650,000 shares.
Finally, Gabriel Chiappini also purchased 200,000 shares for $14,000 increasing his holding to 5.1 million shares.
Black Rock is developing its 100% owned Mahenge Graphite Mine located in Tanzania, which has an estimated net present value (NPV) of US$624 million.
Mahenge is an industry-leading low capex, low cost multi-generational high grade graphite mine.