翡翠晶体颗粒间存在粒隙， 组成颗粒粗大和（或）结构疏松不紧密时会形成微细裂纹。
There is fissure among the crystalline grains of jade. And the microscopic fissure can be formed in jade when it is in the coarse grain and loose structure.
是指组成翡翠的矿物晶面及解理面在翠面的片状闪光。当组成翡翠的矿物颗粒粗大时，特别明显。
Refers to the mineral composition of emerald crystal surface and cleavage plane of When the composition of the mineral particles thick jade, particularly evident.
结果表明：名义尺寸相同而实际尺寸相差较大的磨球所磨出的粉体粒度大且分布不均匀，烧结体硬质相颗粒粗大且等轴性差，抗弯强度和硬度均较低。
It is found that the grain size of the powders milled by balls with different diameters is big, the hard phase is big too and not uniform, the hardness and bending strength are also lower.
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