Some stones exhibit the phenomenon known as color change, most often going from blue in daylight or fluorescent lighting to purple under incandescent light. Sapphires can even be gray, black, or brown.

Sapphire is one of the big three of colored gemstones (the other two are ruby and emerald). This durable gemstone captures jewelry buyers with its practicality and aura of romance. Click here and …

Sapphire is one of the Big 3 of jewelry gemstones—the other two are ruby and emerald. Sapphire is a durable stone that’s the best known blue gem, as well as being available in most colors.

Besides fancy sapphire and star corundum, there’s another interesting variety: color-change sapphire. These fascinating stones change color under different lighting. Their presence adds a special …

Sapphire is corundum, the same type of mineral as ruby, except that it is not red. Sapphire is famous for its blue color, but it also comes in many other colors, such as orange and pink.

In folklore, history, art, and consumer awareness, sapphire has always been associated with the color blue. Its name comes from the Greek word sappheiros, which probably referred to lapis lazuli.

Blue sapphire looks best in daylight and fluorescent light. This spindle-shaped crystal from Sri Lanka weighs 70.10-cts. Blue color distribution in sapphire crystals is often uneven. There is a second …

Jul 16, 2013 · Sapphire is a variety of the mineral corundum, also known as aluminum oxide (Al 2 O 3). Corundum crystallizes in the trigonal crystal system and is normally described using hexagonal axes …

Sapphire, the September birthstone comes in all the colors of the rainbow – except red. Learn more about the birthstone of wisdom, loyalty, and nobility and discover its history and where it can be found.

Sep 1, 2014 · September’s birthstone, Sapphire, is one of the most beloved gemstones. GIA’s Sapphire Buying Guide provides the quick tips you need when shopping for this gem.