Suspended Crystal in Red Spinel
A crystal inclusion in red spinel displays rainbow colors under fiber-optic lighting.
Hollandite in Amethyst
A spectacular display of hollandite crystals is captured within an amethyst cabochon.
Unusual Inclusions in Natural Emerald from Chivor
Tubular three-phase inclusions are observed in a Colombian emerald.
Cross in Natural Diamond
DiamondView imaging revels a cross-shaped fluorescence pattern in a natural diamond.
Distinctive Feather in Diamond
A feather observed in a natural diamond resembles a large reptile.
Exquisite Butterfly in Diamond
A crystal inclusion with a stress halo resembles a colorful butterfly in a 1.01 ct diamond.
Octahedral Gahnospinel Crystal in Sri Lankan Blue Sapphire
A rare octahedral gahnospinel crystal is observed in Sri Lankan sapphire.
“Kaleidoscope” in Alexandrite
Pleochroic colors caused by cyclic twinning produce a kaleidoscope effect in alexandrite.
Pseudo-Icosahedral Pyrite in Colombian Emerald
A 2.88 ct Colombian emerald plays host to a metallic yellow pyrite crystal.
Quarterly Crystal: Hiddenite from Idaho
Sail-shaped etch features provide proof that a sample sold as aquamarine is actually a spodumene crystal.
Yellow Radiation Halos in Iolite (Cordierite)
Zircon, monazite, and apatite inclusions surrounded by yellow halos are observed in an iolite cabochon.
Rock Crystal with Cross Inclusion Exhibiting Brownian Motion
Numerous two-phase inclusions form a cross in a rock crystal pendant.
Spiky Inclusion in Padparadscha Sapphire
An inclusion with a metallic luster is observed in a pinkish orange padparadscha sapphire.
