Article Search Results

Show Filters
Showing 36 results for "*"
Experimental steps of DNA extraction and purification.
DNA Techniques Applied to the Identification of Pinctada Fucata Pearls from Uwajima, Ehime Prefecture, Japan

Shows how genetic material extracted from small amounts of pearl powder can be a useful indicator of this akoya cultured pearl species.

Read More

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.

Read More

Article
Atypical “Beading” in the Production of Cultured Pearls from Australian Pinctada Maxima

In 2011, the authors began to see cases of low-quality natural pearls being used as unconventional “beads” for cultured nacre growth.

Read More

Bracelet containing akoya cultured pearls from Australia
Akoya Cultured Pearl Farming in Eastern Australia

Characterizes the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricata fucata mollusks.

Read More

Three cultured pearls, one natural
Real-Time Microradiography of Pearls: A Comparison Between Detectors

Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).

Read More

Five-strand Natural Pearl Necklace
X-ray Computed Microtomography: Distinguishing Natural Pearls from Beaded and Non-Beaded Cultured Pearls

The distinction of natural from cultured pearls traditionally has been based on X-radiography.

Read More

Purple and white non-nacreous pearls
Non-Nacreous Purple and White Pearls Reportedly from Spondylus Species

Examination of pearls with a dominant purple hue, reportedly from the Spondylus calcifer mollusk.

Read More

Spectral Characteristics of Natural-Color Saltwater Cultured Pearls from Pinctada Maxima
Spectral Characteristics of Natural-Color Saltwater Cultured Pearls from Pinctada Maxima

Natural-color saltwater cultured pearls (SWCPs) from Pinctada maxima were studied using UV-Vis-NIR and PL spectroscopy to better understand the mechanisms of their coloration and to separate them from other SWCPs with similar natural colors.

Read More

3-D modeling software for pearls
Article
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.

Read More

Eight natural-color pistachio pearls
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.

Read More