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Searches for a lab-grown emerald ring often lead to images that look equally green but behave very differently on the hand. An Asscher cut produces broad...

Ruby color is often described with one word—red—but a useful evaluation looks at hue, tone, saturation, cut, lighting, and setting. Lab-grown ruby may appear bright red,...

A gemstone certificate is useful when it helps you understand what you are buying, but it is not a substitute for looking at the actual jewelry,...

People often describe moissanite as exceptionally sparkly, but “sparkle” is actually several optical effects happening at once. Knowing the difference between brilliance, fire, and scintillation gives...