Minerals
Dumortierite
Dumortierite is a fibrous variably colored aluminium boro-silicate mineral from nesosilicate group.Formula: Al(Al2O)(Al2O)2(SiO4)3(BO3)
Colour: Blue, greenish-blue, violet-blue, pale blue, pink, red
Specific Gravity: 3.21 - 3.41
Crystal System: Orthorhombic
Specific Gravity: 3.21 - 3.41
Crystal System: Orthorhombic
Physical Properties
Transparency: Translucent
Streak:White
Hardness:7-8
Tenacity:Brittle
Cleavage:Distinct/Good Distinct on {100}, poor on {110}
Transparency: Translucent
Streak:White
Hardness:7-8
Tenacity:Brittle
Cleavage:Distinct/Good Distinct on {100}, poor on {110}
Locality from Museum Sample
India
Application:
It is used to produce high-quality porcelain. It is sometimes confused with sodalite and lapis lazuli and it is often used as a substitute for lapis lazuli, which costs two to three times less than lapis lazuli.
India
Application:
It is used to produce high-quality porcelain. It is sometimes confused with sodalite and lapis lazuli and it is often used as a substitute for lapis lazuli, which costs two to three times less than lapis lazuli.
