Emerald

Although gemstone magnetism isn’t commonly tested, it can help gemologists distinguish similar looking gems. Learn how to analyze this property.…

The modern August birthstone, peridot has been prized as a jewelry stone since ancient times. Always green in color but with considerable variations,…

How do gems likes rubies and red beryls get their red color? Learn the role impurity ions play in the coloration of these and other gemstones.

The Hayek cut is great for light to medium-colored gem rough that’s blocky but not square enough for an emerald cut. Learn how to facet this lively…

Our ruby buying guide can help you learn how rubies are graded, what to avoid, and how to identify a high quality stone or a bargain in the rough.

Aquamarine is the blue to blue-green variety of beryl. If you encounter so-called white aquamarines, buyer beware. Learn the facts about these…

Blue is one of the rarest colors in nature. Nevertheless, blue gemstones are always in demand for jewelry. While people have adorned themselves…

Padparadscha sapphires get their name from the Sinhalese word for “lotus colored.” This rare and elusive gem generates some debate among…

Mention sapphire and most people will probably imagine this September birthstone as a blue gem. Although blue specimens are probably the most…