Touramaline has many varieties in the nature,and a majority of powder of them is black or cinerous,so their application in the fields where need colour requirements is affected.
自然界产出
电气石品种很多，大部分粉末是黑
或
，在一些需要泽要求领域应用受到较大影响。
,烬Touramaline has many varieties in the nature,and a majority of powder of them is black or cinerous,so their application in the fields where need colour requirements is affected.
自然界产出电气石品种很多，大部分粉末是黑或，在一些需要泽要求领域应用受到较大影响。
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