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Bright yellow inclusions inside barite crystals.
Quarterly Crystal: Orpiment in Barite

Barite cluster from Nevada hosts numerous yellow orpiment crystal inclusions.

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A guest crystal in the star sapphire viewed under cross-polarized light (left) and fiber-optic light (right).
Sapphire Inclusion with Rutile “Silk” in a Burmese Star Sapphire

Illumination techniques reveal a remarkable sapphire inclusion within a Burmese star sapphire.

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Trapiche-like structure in this Kashmir ruby consists of colorless feldspar crystals, black graphite platelets, and rutile crystals.
Trapiche-Like Ruby from the Batakundi Mine, Kashmir

Trapiche-like ruby from Kashmir shows a well-formed fixed six-rayed pattern.

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Faint hemispheres of fibrous, white chalcedony.
Condor Agate from Argentina

A vibrant orange and yellow agate displays interesting concretions in its core.

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Lath-like grandidierite mineral inclusion in sapphire.
Grandidierite Inclusions in Sapphires

Grandidierite, an unusual inclusion in sapphire, independently encountered by two laboratories.

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Polished free-form opal encapsulating an insect.
Fossil Insect in Opal

Precious opal hosts a trapped insect.

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Blue lazurite in a light gray spinel.
Lazurite in Spinel

A light gray spinel features a striking vibrant blue lazurite inclusion.

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Native copper inclusions in purple chalcedony.
Native Copper Inclusions in Indonesian Purple Chalcedony

Indonesian purple chalcedony containing interesting native copper inclusions is a first for the Carlsbad lab.

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Large rough beryl crystal containing multiphase inclusions.
“Double Bubble” Multiphase Inclusion in Beryl

A “double bubble” of gas within gas appears in a 64.10 ct pale green rough beryl at room temperature.

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Inclusions in sapphire SASLR050_01.
U-Pb Ages of Zircon Inclusions in Sapphires from Ratnapura and Balangoda (Sri Lanka) and Implications for Geographic Origin

Establishes a metamorphic origin for sapphire samples from these deposits, supported by their trace-element composition and inclusion characterization, including the age dating of zircon inclusions.

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