Following a “depressed and opportunistic” time for its diamonds at its fifth sales cycle of this year, LSE-listed Petra Diamonds has chosen to only sell a portion of its South African goods, representing about 75% by volume, and about 50% by value. The remaining goods were exported to Antwerp and of these, about 75% were subsequently sold at the company’s Antwerp marketing office, the London-listed diamond miner said on April 9.