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Lignum vitae is the hardest wood in the world. It measures 4500 Janka on the Janka Scale. It is the scale that the world uses to measure the hardness of a piece of wood.
http://answers.ask.com/Business/Constructions_and_...
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Lignum Vitae is said to be the hardest wood in the world. It is found in South America and used to be used to make propellers for ships.
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A wood's Janka number is a basically a hardness rating--the higher the number, the harder the wood. Hardness is tested on solid wood--engineered woods and laminate woods use different
http://www.ehow.com/facts_7161571_hardest-wood-flo...
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Two useful ways of measuring woods are the Janka Scale, which measures hardness, and Specific Gravity, which measures density. The Janka Hardness test measures the hardness of woods
http://www.ehow.com/info_8203497_type-wood-hardest...
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