When the rotation were found on the cleavageplane appear half reflecting feldspar, half are not reflective, this is when a white reflective Carlsbad twin;
当旋转标本，发现长石解理面上出现一半反光，一半不反光时，此即为卡斯巴双晶；
2
Refers to the mineral composition of emerald crystal surface and cleavageplane of When the composition of the mineral particles thick jade, particularly evident.
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。
3
Mineral powders are good crystalline, and they break along the cleavageplane when they are comminuted, which cause the mineral powders have flat surfaces and sharp edge angles.