Dumortierite
デュモルティエライト
蓝线石
Dumortierite
Dumortiérite
Glossary
Thematic
Jewellery, Material
A blue to violet ornamental stone silicate mineral that is used as used for watch dials. Dumortierite has a hardness of 7 - 8.5 and a specific gravity of 3.3 - 3.4.