6.5 x 5.7 x 2.5 cm. (2.6 x 2.2 x 1 in.) ...

With what it takes to make synthetic diamonds ... or aluminum oxide. Where sapphire gets its blue tint mainly from iron, rubies get their pink to blood-red hue from chromium.

Synthesising a coloured sapphire involves incorporating dopants into the aluminium oxide crystal structure, with different ...

Including a lilac sapphire case, the new RM 07-02 Automatic Sapphire timepieces are the latest evolution of Richard Mille's ...