Very Small Akoya Cultured Pearls
A selection of very small akoya cultured specimens demonstrates the challenges gemologists face when determining pearl origin.
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.
Plastic Amber Imitation in a Rosary
Examination reveals both amber and Bakelite plastic beads in a rosary submitted for identification.
Blue Cat's-Eye Apatite
Deep blue apatite with a cat’s-eye effect, however, is very rare.
“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.
Purple Pyrope-Almandine Garnet From Mozambique
Analysis of attractive purple garnets from a new deposit in central Mozambique.
Synthetic Moissanite Imitations of Synthetic Colored Diamonds
Three faceted specimens, thought to be synthetic colored diamonds, are identified as synthetic moissanite.
A pendant, submitted as jadeite, is identified as serpentine.
Natural Faceted Red Rutile
A dark red stone is revealed to be natural red rutile, the first faceted specimen seen in the Carlsbad lab.
Blue Chalcedony Partially Filled with Epoxy Resin
A carving identified as blue chalcedony shows evidence of epoxy resin treatment.