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.
The Sapphire Necklace performance of the surviving music and lyrics from the opera was given, with a new libretto by Scott Farrell, in Rockford, Illinois. "(With Sullivan's repeats eliminated)" The Sapphire Necklace The Sapphire Necklace, or the False Heiress (completed by 1867, and at least mostly completed by 1864), was the first opera composed by Arthur Sullivan. It was never performed, and most of the music and libretto are now lost. After his incidental music to "The Tempest" brought Arthur Sullivan early fame in 1862, he began to experiment with a wide variety of musical compositions. By 1864, he had written a ballet