Petra sells 41.82-carat blue diamond, lifts third-quarter revenue to $68 million

A 41.82-carat blue diamond gave Petra Diamonds a sharp boost in a quarter that still looked uneven beneath the surface. The company said the stone, recovered at Cullinan Mine in South Africa, was sold during the third quarter of fiscal 2026 and helped lift revenue to US$68 million from US$49 million in the previous quarter.

Petra sold 781,797 carats in the period ended 1 April 2026, and the company said the diamond sale was included in those results. The jump in revenue amounted to US$19 million quarter on quarter, a meaningful lift for a miner whose business still depends heavily on how the market treats stones at different sizes and qualities. This was not a broad-based recovery. Petra’s joint chief executives, Vivek Gadodia and Juan Kemp, said conditions remained challenging, especially in the smaller-sized segments.

That contrast is what makes the blue stone matter. Petra first announced the recovery on 13 January 2026, describing it as a 41.82-carat Type IIb blue diamond of seemingly exceptional quality in both color and clarity. Rapaport said it was the first diamond of its color and magnitude to come out of Cullinan Mine in five years, with the previous notable blue from the site a 39.34-carat stone recovered in April 2021. In a market where commercial goods can soften quickly, a single exceptional stone can still change the tone of a quarter.

For collectors and high-jewelry buyers, the lesson is familiar but easy to forget: trophy stones do not behave like the broader diamond trade. Rare fancy-color diamonds, especially large blue stones with strong color and clarity, can retain their own gravity even when smaller goods struggle. Petra said the recovery demonstrates the quality of Cullinan Mine’s resource, and this sale gives that claim a concrete test. The mine has long occupied a special place in diamond history, and stones like this one keep it there.

The result also lands against a more stable corporate backdrop. Petra said in its 27 February 2026 interim results that the first half of the year was pivotal, after it completed a refinancing and extension of its debt facilities, giving the group greater stability in its capital structure. With debt terms reset and a rare blue diamond monetized, Petra enters the rest of FY 2026 with one of the strongest arguments any miner can make: the right stone can still separate itself from a weak market.