Sandalwood is considered to be the most expensive wood in the world. But sandalwood is not the most expensive wood in the world but the most expensive wood in the world is the African blackwood obtained from the ‘Dalbergia melanoxylon’ tree. The price of 1 kg of this wood is 7 to 8 lakh rupees. This tree grows up to 25 to 40 feet and takes about 60 years to grow a single tree. This tree is found in the central and southern parts of the African continent and is found in 26 countries of the world.