Glossary
Dumortierite
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.
Related theme:
- french: Dumortiérite
- japanese: デュモルティエライト
- chinese: 蓝线石
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