紫檀木类最硬,心材气干密度大于(12%木材含水率)1.00克/立方厘米;花梨木类,心材气干密度大于(12%木材含水率)0.75克/立方厘米;香枝木类,心材气干密度大于(12%木材含水率)0.80克/立方厘米;黑酸枝木类,心材气干密度大于(12%木材含水率)0.85克/立方厘米;红酸枝木类,心材气干密度大于(12%木材含水率)0.85克/立方厘米;
乌木类,心材气干密度大于(12%木材含水率)0.90克/立方厘米;条纹乌木类,心材气干密度大于(12%木材含水率)0.90克/立方厘米;
鸡翅木类,心材气干密度大于(12%木材含水率)0.80克/立方厘米.