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Two white jade bracelets with dark color patches.
Nephrite Bracelet with Filled Cavity

A jade bracelet contains unusual fillers, used to create a smooth surface.

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This 20.60 ct specimen was purchased by the client as a “natural white pearl.”
Filled Pearl with Surface Features

A pearl, thought to be natural, is revealed to be a bead-cultured specimen with a pre-drilled nucleus.

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Uneven color and blemishes on low-quality cultured pearl necklace.
Dyed Yellow Beaded Freshwater Cultured Pearls Imitating South Sea Cultured Pearls

A yellow cultured pearl necklace is compared to the work of a producer specialising in freshwater pearls of all colours.

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Sango pearls and coral bead.
“Sango Pearl” from Japan

A study of a pink Japanese akoya cultured pearl yields information about the material’s colour origin.

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Innovative cultured necklaces available at Mastoloni’s AGTA booth.
Cultured Pearl Market Update

A report from Tucson on the outlook of the pearl market.

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Pinctada mazatlanica shells.
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.

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Margaritologia
Pearl Newsletter: Margaritologia

Margaritologia, a quarterly newsletter on pearls, was recently launched by Elisabeth Strack.

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Parcel of natural pen pearls
The First Identified Non-Nacreous Beaded Cultured Pearl

A report on what appears to be the first non-nacreous beaded cultured pearl examined by a laboratory.

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Giant Clam Pearl
A Large Baroque Tridacna Gigas (Giant Clam) Pearl

This giant clam pearl was noteworthy for its size and interesting colouration, and its pronounced banding when viewed with transmitted light.

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Gem inventory at Tucson
Tucson 2015

A summary of the findings at Tucson’s 2015 gem shows.

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