Program aims to educate young consumers about mined stones’ positive qualities.
Lucara also recovered a 111-carat stone and two over 50 carats.
Decrease in revenue, impairment charge and “significant” expense on underground transition take toll.
Manufacturer will purchase all diamonds over 10.8 carats and give miner a share of polished profit.
Type IIa diamond was found at mine’s high-value M/PK(S) unit in the south lobe.
Chief financial officer and vice president of technical services both resign.
Miner cites “material breach of financial commitments” by Belgian manufacturer.
Discovery follows that of 1,080ct. diamond earlier this month.
Departing chief is one of miner's original founders.