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.
Which are the features of a Fine Watch?
Learn about the criterias of Fine Watchmaking.
17 May 2013
While Patek Philippe again claimed the most valuable lot at the spring auction session in Geneva, Rolex confirmed its as…
16 May 2013
Sistem51, the new Swatch self-winding mechanical movement, is to be assembled and adjusted entirely by machine. This gro…