Jewel was from the collection of Queen Nazli, former queen mother of Egypt.
Campaign, aimed at generating sustainable demand, will run through 2030.
Average cost of mined stone was $4,063 in 2025, up 25% from 2023.
Company expects positive results in second quarter and has upped guidance for full year.
Deposit will go on care and maintenance from July.
Pinks and blues make up top five lots, including one likely to fetch over $6 million.
Company intends to focus on higher-value stones at Cullinan, which are in greater demand during prolonged industry downturn.
Attempts to access missing pieces’ grading reports tipped off laboratory.
Indian organization is first industry body to gain membership under Luanda Accord framework.
Pulling stock off public trading gives miner more flexibility for restructuring or going private.
Natural diamonds can have weight measurements listed in carats, while lab-grown can appear only in grams.