Lucara said the first $170 million would be available in mid-September, adding that total costs will be largely covered via a combination of loans, cash resources and equity financing.
Moving Karowe underground, a plan announced in late 2019, will allow Lucara to exploit the highest value part of the orebody first. This would generate over $5.25 billion in gross revenue, chief executive officer Eira Thomas has said.
The company noted that construction efforts had ramped up since the facilities documentation was executed in mid-July.
The pre-sinking of ventilation is underway and a total of four blasts have occurred to date with continued drilling, mucking, and installation of ground support on a 24-hour basis.
The company is mobilizing the remaining pre-sinking equipment and contractors.
Lucara says Karowe remains one of the highest-margin diamond mines in the world, producing an average of 300,000 high-value carats each year.
The mine, which began commercial operations in 2012, has already become the only one in recorded history to have yielded two 1,000+ carat diamonds — the 1,758 carat Sewelô in 2019 and the 1,109 carat Lesedi La Rona in 2015, which sold for $53 million.