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Re:The Hardest Woods by Salamat on Monday October 22, 2018 @12:32PM (#18276056)
I visited abkhazia and was told they have wood that is very hard it does not float in water. Could not verify that.
Re:The Hardest Woods by eco on Monday October 22, 2018 @01:07PM (#18276364)
Yeah, Lignum Vitae doesn't float. This Old House has a clip showing this off. https://www.youtube.com/watch?v=CI39sMIy6mE
Re:The Hardest Woods by Someone on Monday October 22, 2018 @12:56PM (#18276268)
Nitpick: they likely are highly correlated, but hard woods do not have to have high density.

Looking at https://www.wood-database.com/wood-articles/top-ten-heaviest..., the entire top 10 is heavier than water (#10 is almost 20% heavier; #1 over 35%)