>

keep my inbox inspiring

Sign up to our monthly newsletter for exclusive news and trends

Follow us on all channels

Start following us for more content, inspiration, news, trends and more

© 2017 - Copyright Fondation de la Haute Horlogerie Tous droits réservés

Hublot – Colour me sapphire
New Models

Hublot – Colour me sapphire

Tuesday, 18 April 2017
By The HH Journal editors
close
The HH Journal editors

Read More

CLOSE
2 min read

After proving its capacity to machine sapphire cases on a large scale, Hublot adds colour. Blue or red, the Big Bang Unico Sapphire is a shade above!

While coloured synthetic sapphires have been in existence since 1902, when they were invented by the French chemist Auguste Victor Louis Verneuil, melting sapphire is a complex and unpredictable process. Because its crystallisation process is unstable, it is difficult to obtain similarly coloured sapphires, even if they are produced simultaneously. Furthermore, bubbles and cracks can appear in the material, making the end result unsuitable for producing Big Bang cases. But the main challenge is in the size. Thus far, no coloured sapphires exceeding 2 kg have been produced. However, Hublot has now gone beyond this threshold. By pushing the limits of engineering and chemistry, it has developed a sophisticated and costly process that has resulted in the successful production of a large, transparent sapphire of perfectly uniform colour. Hublot heats aluminium oxide (Al2O3) — the raw material for sapphire — with a transition metal, chromium (Cr), at a temperature of between 2000 and 2050 degrees Celsius. The result is a coloured sapphire that retains all the original properties of a material which is ultra-scratch resistant, completely transparent and among the hardest in existence. The innovation extends to the colour — the first blue sapphire in the history of watchmaking.

Hublot Big Bang Unico Sapphire
Hublot Big Bang Unico Sapphire

The case middle, the bezel and the case back of the Big Bang Unico Sapphire are cut from blocks of blue coloured sapphire. Flange, indices, Arabic numerals and hour/minute hands toned to match the colour of the sapphire, through contrast revealing the mechanism of the Unico HUB124 proprietary movement and its column wheel on the dial side.

Hublot Big Bang Unico Sapphire
Hublot Big Bang Unico Sapphire
Breitling for Bentley Supersports B55
Watches & ...
Geared up!
Friday, 26 May 2017
The HH Journal editors
1 min read
10
In The Market
Luxury's digital challenge
Wednesday, 24 May 2017
5 min read
Vianney Halter
Portraits
Vianney Halter, the watchmaker of future past
Tuesday, 27 September 2016
8 min read
11
Antoine and Florian Preziuso
Portraits
In the name of the father, son and tourbillon
Wednesday, 16 November 2016
5 min read
13