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Strand of small akoya bead-cultured pearls.
Very Small Akoya Cultured Pearls

A selection of very small akoya cultured specimens demonstrates the challenges gemologists face when determining pearl origin.

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Musgravite from Myanmar
Musgravite from Myanmar

Two small, near-colorless stones reportedly from Myanmar (0.11 and 0.24 ct; figure 1) were recently loaned to GIA for examination for identification.

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Amber and plastic reactions to illumination.
Plastic Amber Imitation in a Rosary

Examination reveals both amber and Bakelite plastic beads in a rosary submitted for identification.

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Blue Cat's-Eye Apatite
Blue Cat's-Eye Apatite

Deep blue apatite with a cat’s-eye effect, however, is very rare.

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Natural-color yellow sapphires with FTIR features of Punsiri-treated sapphire
“Punsiri”-type FTIR Spectral Features in Natural Yellow Sapphires

Testing of natural-color yellow sapphires from Australia and Thailand with the FTIR features of “Punsiri” heat-treated material.

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Purple pyrope-almandine garnets from Manica Province, Mozambique
Purple Pyrope-Almandine Garnet From Mozambique

Analysis of attractive purple garnets from a new deposit in central Mozambique.

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Synthetic moissanite imitating synthetic colored diamonds.
Synthetic Moissanite Imitations of Synthetic Colored Diamonds

Three faceted specimens, thought to be synthetic colored diamonds, are identified as synthetic moissanite.

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Serpentine pendant.
Polymer-Coated Serpentine

A pendant, submitted as jadeite, is identified as serpentine.

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Natural red and synthetic orange rutile
Natural Faceted Red Rutile

A dark red stone is revealed to be natural red rutile, the first faceted specimen seen in the Carlsbad lab.

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Carving submitted for testing as blue chalcedony.
Blue Chalcedony Partially Filled with Epoxy Resin

A carving identified as blue chalcedony shows evidence of epoxy resin treatment.

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