Lignum vitae
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Lignum vitae, also called guayacan or guaiacum, and in parts of Europe known as Pockholz or pokhout, is a wood from trees of the genus Guaiacum. The trees are indigenous to the Caribbean and the north
Round mallet of lignum vitae, all sapwood
Wood of Bulnesia sarmientoi
Pete Seeger with his extra-long, lignum vitae banjo neck
A hand plane with a lignum vitae sole, likely not actual Guaiacum but Bulnesia, and a pearwood body
Janka hardness test
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The Janka hardness test, created by Austrian-born American researcher Gabriel Janka, measures the resistance of a sample of wood to denting and wear. It measures the force required to embed an 11.28-m
Lignum vitae
…it will easily sink in water. On the Janka scale of hardness, which measures hardness of woods, lignum vitae ranks highest of the trade woods, with a Janka hardness of 4,390 lbf (19,500 N) (compared with Olneya at 3,260 lbf (14,500 N), African blackwood at 2,940 lbf (13,100 N), hickory at 1,820 lbf (8,100 N), red…
Janka hardness test