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“Meteor Shower” in a Pearl
A natural nacreous pearl from the Mytiloidea superfamily displays a visual effect suggestive of a meteor shower.
“Comet Tail” Needle Cluster in Garnet
A cluster of needle inclusions in a pyrope-almandine garnet is reminiscent of a comet’s tail.
“Spiderweb” Structure on a Pearl’s Base
Examination of a natural pearl reveals a cavity formation with thread-like filaments.
Play-of-Color on a Pen Pearl
Calcitic crystals on the surface of a pen pearl display a play-of-color phenomenon under fiber-optic illumination.
Atypical Bead Cultured Pearls Identified in a Natural Pearl Necklace
The Mumbai laboratory encounters numerous small atypical bead cultured pearls drilled and strung alongside natural pearls.
An Unusual Filled Cultured Pearl
A light gray near-round pearl exhibits an opening plugged with a drilled seed pearl.
Transparent Staurolite
A rare transparent dark red-brown freeform step-cut staurolite is examined in the Carlsbad laboratory.
Interpenetrant Twins in Natural Diamond
A vivid orangy yellow rough diamond displaying penetration twinning is examined in the Carlsbad laboratory.
Mystery Bubble in Spinel
An inclusion feature with a mobile bubble is examined in a spinel reportedly from Myanmar.
Quarterly Crystal: Spires on Moldavite
A rare specimen of moldavite tektite with unbroken spires from the Czech Republic is examined.
Evidence of Heat Treatment in Spinel
Examination of inclusions in a red spinel reveals signs of heat treatment.
Uniquely Patterned Clouds in Sri Lankan Sapphire
Particle clouds with an interlocking triangular pattern are revealed in a blue sapphire from Sri Lanka.
Cinnabar in Quartz
Striking red cinnabar inclusions are observed in a quartz specimen from China.
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