Sapphire jewelry. They also may be created synthetically in laboratories for industrial or decorative purposes in large crystal boules. Because of the remarkable hardness of sapphires – 9 on the Mohs scale (the third hardest mineral, after diamond at 10 and moissanite at 9.5) – sapphires are also used in some non-ornamental applications, such as infrared optical components, high-durability windows, wristwatch crystals and movement bearings, and very thin electronic wafers, which are used as the insulating substrates of very special-purpose solid-state electronics (especially integrated circuits and GaN-based LEDs). Sapphire is the birthstone for September and the gem of the 45th anniversary.
Sapphire Princess Sapphire Princess Sapphire Princess is a cruise ship owned by Princess Cruises that entered service in 2004 as the twin sister ship of "Diamond Princess". She is one of the world's largest cruise ships, with a capacity of 2,670 passengers and is the sixth Gem Class ship built by Princess Cruises. "Sapphire Princess" was christened on June 10, 2004 in Seattle—the first cruise ship ever to be christened in that port. Currently, "Sapphire Princess" is sailing Asian cruises from Shanghai year-round until the arrival of the "Majestic Princess" in 2017. After the arrival, it will resume sailing from China in