这是一个rarest and most valuable woods in the world，but what makes it so special.
这是african blackwood，a tree that grows incredibly slowly and can take decades to reach a usable size.
这是slow growth combined with its limited natural range makes large pieces of this wood extremely difficult to find here.
这是sawmill carefully cuts the log into thick wooden slabs.
这是revealing the deep almost black hardwood inside.
这是slabs can later be used for high end furniture luxury interiors and other premium products.
这是incredible density and durability make it one of the hardest and heaviest woods around.