Lignin character and use: diffuse-porous wood. Air-dry density is about 1.14-1.25g/ cm³, with mid stability in lumber size, even heavy and hard lumber and extremely fine wear-resistance. It is one of the famous heavy &hard lumbers in the world with high intensity, obvious discrimination in lignin-hue between the core and margin. The lignin-hue of the lignin core is changeable. The fresh lignin-heart is slightly to deep olive green or chocolate, for a long time it will transfer to the dark blue with the grey and nearly black stripes.