sapphire

Although non-gem corundum occurs abundantly all over the world, gem-quality ruby and sapphire are significantly rarer. Their sources are also…

How do gemologists distinguish between rubies and pink sapphires? Learn about the chemistry of corundum and the history of the color pink.

I recut this from a commercially cut stone that had a bad window in it. This sapphire faces up to look closer to one carat in size as it is a bit shallowish,…

Appraising blue sapphires is a critical skill for any jeweler or gemologist. Learn the basics you’ll need to evaluate one of the most popular…

Large, beautiful, and historically important, these eight famous sapphires have fascinating stories to tell. Learn what makes them so special.…

The geological conditions in which rubies and sapphires form are rare and extreme. Learn how these popular gems develop and how they get their colors.…

This unheated sapphire has a pleasing powder blue color and, even though it has some fine silk under magnification, I can’t see any inclusions…

This sapphire has an almost tsavorite garnet-like green color in person.

This sapphire shows a nice mix of medium and lighter medium blue flashes.