Large Stellate Dislocation in Spinel
A greenish blue spinel displays a large network of needle-like dislocations clustered in a six-rayed star pattern.
Fissure with Moiré Pattern in Spinel
A precipitation of an unidentified mineral creates a complex moiré pattern in a fissure of a purple spinel.
Zigzag Fingerprint in Sri Lankan Sapphire
Fiber-optic illumination reveals rectilinear zigzag-patterned films with vibrant colors in a blue sapphire.
Rainy Lakeside City in Peridot
Blade-like magnetite inclusions developed from a healed fracture in peridot resemble a dark, rainy afternoon in a lakeside city.
Heliodor with a Large Schorl Inclusion
An 8.33 ct rectangular heliodor displays two tourmaline inclusions and a thin band of fluids.
A Red Herring in a Red Garnet
Transparent crystal inclusions and gas bubbles are observed in a garnet-topped doublet.
Inclusion Resembling a Gada in Diamond
An etch channel in the crown facets of a diamond resembles a mace-like weapon.
Tourmaline in Emerald
Examination of a Zambian emerald reveals prismatic black tourmaline inclusions.
Breyite in Diamond
Iridescent Inclusion in Brown Diamond
An iridescent crystal with a stress halo is observed in a light brown diamond.
Natural Diamond with Twinning Wisps Resembling a Whale
Examination of a round brilliant diamond reveals twinning wisps in the formation of a whale.
Spray of Columbite Crystals in Topaz
A cluster of bladed columbite crystals is identified in colorless topaz.
Turquoise Planet Earth
A sphere of Armenian turquoise with natural brown matrix material mimics planet Earth.