inclusions

Round brilliant-cut demantoid with “horsetail” inclusions, 0.87 cts, 5.7 mm, Russia. © The Gem Trader. Used with permission.

This peridot, cut from a pallasite meteorite found in Indonesia, features some needle-like inclusions — crystals trapped within the gem —…

Russian demantoid with horsetail inclusions, 0.38 cts, 4.3 x 3 mm. Photo courtesy of liveauctioneers.com and Jasper52.

Brilliant, oval-cut demantoid with horsetail inclusions. 2.67 cts, 8.27 x 6.81 x 5.71 mm, Ural Mountains, Russia. © Rob Lavinsky, www.iRocks.com.…

Sometimes during a crystal’s formation, a new layer grows over a transparent crystal. When the growth of the original crystal resumes, it’s…

A haüyne crystal (2 mm) with a small gas bubble inclusion in its lower left area. (The pinkish crystals are nepheline; the matrix is augite). San…

Phenakite contains the rare element beryllium. A few of these rare gemstones have been found to contain as inclusions another rarity, a recently…

The dark color in this sapphire helps to hide inclusions. It looks very clean. Photo by Katrina Br*?#*!@nd. Licensed under CC By-SA 2.0.

This Ethiopian emerald shows off its prominent black tourmaline inclusions. © Rob Lavinsky, www.iRocks.com. Used with permission.