In the case of something so unique, there's a strong argument for it being acquired by a museum so it can be enjoyed widely, and studied by geologists.
It's just a diamond, they are not very interesting unless you believe the TV commercials that tell you they are super important and special. Carbon is carbon.
I'm just laughing at 800 MILLION YEAR OLD ROCK. Like you know how old all the rocks are right?
Classic by now article a must read - “Diamonds are Bullshit”
Here that article was discussed at HN: (7 years ago, 1088 votes)
Umm, yes, they do. They know what layer of rock it was found in and can uranium date the surrounding rocks.
They might, perhaps, be able to date how long it's spent on the Earth, while making wild assumptions about pre-historic conditions that we (by definition) weren't around to observe.
I took it as "really, a rock that is old?!" rather than "they can't know that". But I might have misunderstood.
However this article is about a particularly interesting diamond. Trees aren’t rare, but people travel to see particularly interesting trees and forests.