Chemical Formula: Al7BO3(SiO4)3O3
Specific Gravity: 3.3-3.4
Hardness: 7-8 Dumortierite is a blue to violet aluminum borosilicate mineral that often forms as fibrous or columnar crystals. It is used as an ornamental stone and in jewelry.
Chemical Formula: Al7BO3(SiO4)3O3
Specific Gravity: 3.3-3.4
Hardness: 7-8 Dumortierite is a blue to violet aluminum borosilicate mineral that often forms as fibrous or columnar crystals. It is used as an ornamental stone and in jewelry.