Nothing like what they cost.
Paper is, what, 44-50% carbon by weight? Imagine a ring with the weight of even a small stack of bills.
It wasn't long ago that the paper was worth more than the rock.
But if you burn it, you lose the carbon. Char it instead.
Re:Diamonds Keep Getting Cheaper
by smegger001 on Thursday November 14, 2019 @01:14AM
(#21533196)
Paper was valuable enough at one point it was considered the traditional gift for first anniversaries in the U.S.
Re:Diamonds Keep Getting Cheaper
by dan-robertson on Thursday November 14, 2019 @05:37AM
(#21534365)
I think the reason that it is the first anniversary gift is that it was not considered valuable (unlike eg silver/gold/ruby/diamond/...)
I wonder how much money you'd have to actually burn to extract enough carbon to create a decently sized diamond from it