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Lignum vitae is hard and durable, and is also the densest wood traded (average dried density: ~79 lb/ft 3 or ~1,260 kg/m 3); [4] 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 (compared with Olneya at 3,260 lbf, [5] African blackwood at 2,940 lbf, hickory at 1,820 ...
Mexican ironwood carving is a Mexican tradition of carving the wood of the Olneya tesota tree, a Sonora Desert tree commonly called ironwood (palo fierro in Spanish). Olneya tesota is a slow growing important shade tree in northwest Mexico and the southwest U.S. The wood it produces is very dense and sinks in water.
Cross-section of an unprocessed piece of ebony wood. Ebony is a dense black/brown hardwood, coming from several species in the genus Diospyros, which also includes the persimmon tree. A few Diospyros species, such as macassar and mun ebony, are dense enough to sink in water.
The Guinness Book of World Records lists this tree as the world's heaviest wood, with a specific gravity of 1.49, similar to that of anthracite or dry earth. [8] It is known for its tendency to sink in water, unlike other wood materials. It is also one of the world's hardest woods according to the Janka hardness test. The timber has a good ...
The wood is hard, heavy and self-lubricating, and has a Janka Hardness Score of 4500, [8] which is one of the hardest in the world. It can sink when placed in water. [ 9 ] There are fine ripple marks on the wood.
The tree's wood density is extremely high (up to 1,200 kg/m 3 (2,000 lb/cu yd)), making it sink in water. It is also hard to treat both manually and mechanically. The wood itself is short grain, subject to cracking.
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The weight by volume (at 12% moisture content) of Pouteria wood can be in excess of 1140 kg/m 3 (71 lb/ft 3; thus, the wood sinks in water. The wood of Pouteria species is prone to considerable movement and warping when it dries out, but in its main use, naval construction, this is not a problem, since the wood never gets really dry.