Geology

We know that diamonds are steeped in ethical issues.Conflict, smuggling and pollution are all associated with the gemstones (read this 2015 report from Amnesty International, which takes the Central African Republic as a case study, if you want to know more).
It's one of the 10 largest ever recorded.
One attendee was arrested for trying to sell a police officer drugs.
'It's an incredibly rare find - almost like winning the lottery.'