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Pearl
Perfect shining spheres. Lustrous baroque forms. Seductive strands, warm to the touch. Pearls are simply and purely organic.
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Research
Spectral Characteristics of Pinctada Mazatlanica and Pinctada Margaritifera Pearl Oyster Species
Examination of shells from on P. mazatlanica proves the similarities between that species and P. margaritifera.
Iridescent Spondylus Pearl
Iridescence is seen in a porcelaneous pearl examined at the Carlsbad laboratory.
New 3-D Software Expands GIA’s Pearl Identification Capabilities
GIA’s 3-D modeling software is a powerful research tool for exploring and reconstructing the internal features of a pearl.
Identification of “Pistachio” Colored Pearls Treated by Ballerina Pearl Co.
A report on the color treatment process for these intensely greenish yellow to yellowish green cultured pearls and the techniques for identifying them.
Large Natural Fossil Blister Pearls from Tridacna (Giant Clam) Species
Two blister pearls attached to a host shell believed to have fossilized during the later Pleistocene period and discovered in southeastern Kenya are studied.
A Natural Pearl with an Intriguing Internal Structure
A semi-baroque pearl with an unusual radial feature is submitted to the Bangkok lab for testing.
Two Large Natural Pearls Reportedly from Spondylus and Trochoidea Species Mollusks
Natural pearls of unusual size and unique appearance are retrieved from the west coast of Mexico and examined in GIA’s New York lab.
Assembled Cultured Blister Pearl with an Unusual Component
An assembled mabe pearl contains a fluted object, the function of which is unknown.
Three Unique Large Natural Pearls from Haliotis (Abalone) Species
Abalone pearls submitted to the New York lab provide insight into the range of colors and shapes this type of mollusk can produce.
GIA Field Gemologists Visit Pearl Farms Near Mergui, Myanmar
Dip beneath Myanmar’s waters in search of South Sea cultured pearls with GIA’s field gemologists.
Nonbead-Cultured Pearls from Strombus Gigas
Advances in pearl culturing are seen in a parcel of specimens from Strombus gigas gastropods.
Strong Pinkish Purple Freshwater Bead-Cultured Pearls
A necklace of Chinese freshwater bead-cultured pearls demonstrates the strides made in culturing techniques.
