Here are Quebracho wood, one of the heaviest woods, and Balsa wood, one of the lightest, are being compared on a scale.
The heaviest wood is Black Ironwood, 81.1 lbs/ft3 (1,300 kg/m3).
Quebracho comes in a few behindVersion:1.0 77.1 lbs/ft3 (1,235 kg/m3).
Balsa on the other hand comes in at 9 lbs/ft3 (150 kg/m3)
© The Field Museum, B79955.
Quebracho wood (left) and Balsa wood (right) compared on a scale.