inclusions

Many varieties of gems besides diamond can be created in the laboratory. Our synthetic gemstone guide covers many examples and explains their…

Whether you’re an expert or novice gemologist or collector, add these gemology reference books we’ve reviewed to your library.

Padparadscha sapphires show a blend of orange and pink colors, one of the rarest of all sapphire color combinations. Padparadschas are some of…

Sunstones contain hematite or goethite inclusions, which reflect light in parallel orientation and create a sparkling sheen in gold to brown…

Albite, usually colorless but sometimes yellow, pink, gray or reddish. Translucent albite is sometime colored green by chrome jadeite. It is…

Feldspars are the most common minerals at the Earth’s surface. In fact, if the entire composition of the Earth’s crust were regarded as a single…

Current Value of Amber Based on Color, Cut, Clarity and Weight

Synthetic spinel is a widely used jewelry stone. Learn how gemologists can identify lab-made flame-fusion, flux, and Czochralski spinels.

A nice Umba sapphire with an interesting mix of colors and good brilliance. It has some inclusions, but they are well hidden and generally not very…