We revise the historic context of freshwater pearl culture in Asia, updating the present
situation and perspectives of this activity in Mexico, and, possibly, in some Latin American …

Freshwater pearl farming is an emerging sector of aquaculture in Bangladesh which plays a
growing role at major jewelry markets. With some improved techniques, high quality image …

Cultured pearls quality produced by the mollusk Pinctada margaritifera var. cumingi is
determined by a panel of criteria, of which shape is one of the most relevant. Cultured pearls …

A non-destructive neutron analysis technique performed at the IMAT beamline of the STFC
(Science and Technology Facility Council), UK, is presented. In this experiment, neutrons of …

Digital radiography and computed tomography are two fundamental diagnostic techniques
in different fields of research, including cultural heritage studies and gemmology. The …

The present study applied Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry
(LA-ICP-MS) on a large number of natural and cultured pearls from saltwater and freshwater …

For centuries, wild pearl oysters and mussels were fished in the quest for natural pearls and
shell material. This eventually led to the drastic overexploitation of oyster stocks in many …

MATERIALS AND METHODS Our specimen was an undrilled, silver-colored baroque
cultured pearl, with a pink to blue overtone,(figure 1) cultivated in Pinctada maxima. It was …

One of the main duties of gemmological laboratories working for the pearl trade is to
distinguish natural (Figure 1) from cultured pearls. This separation, as well as the …

French Polynesia is renowned for the production of Tahitian black pearl. These gems are
obtained by grafting a nucleus into the gonad of a receiving oyster together with a graft, ie a …