Umm, yes, they do. They know what layer of rock it was found in and can uranium ... | Hacker News

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		bluedevil2k on Jan 22, 2020 \| parent \| context \| favorite \| on: ‘Matryoshka’ diamonds unearthed in Siberia (2019) Umm, yes, they do. They know what layer of rock it was found in and can uranium date the surrounding rocks.

strbean on Jan 22, 2020 | [–]

I took it as "really, a rock that is old?!" rather than "they can't know that". But I might have misunderstood.

twodave on Jan 22, 2020 | [–]

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.

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