When the rotation were found on the cleavage plane 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；
When the rotation were found on the cleavage plane 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；
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