Natural Pearls from Australian Pinctada Maxima

  title={Natural Pearls from Australian Pinctada Maxima},
  author={Kenneth Scarratt and Patrick Bracher and Michael Bracher and Ali Attawi and A. Al Safar and Sudarat Saeseaw and Artitaya Homkrajae and Nicholas Sturman},
  journal={Gems \& Gemology},
X-ray Micro-Tomography as a Method to Distinguish and Characterize Natural and Cultivated Pearls
Digital radiography and computed tomography are two fundamental diagnostic techniques in different fields of research, including cultural heritage studies and gemmology. The application of these
Water Quality and Chemical Analysis of Marine Cultured Pearl and its Oyster Shell
1Department of Zoology, St. Xavier's College, Mumbai, India 2The R&D department, Gemological Science International, Mumbai, India
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Since thousands of years, gems were used as tools and amulets often associated with social status and money. At the beginning, gems were used in their rough form, or polished with curved surfaces or
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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 environments, which
Golden South Sea Cultured Pearls:Cultivation Steps & Gemmological Investigations
The South Sea pearl oyster Pinctada maxima is known to produce white, cream and golden pearls. Such pearls are cultured mainly in Australia, Burma (Myanmar), Indonesia and the Philippines.
Sustainability and traceability in marine cultured pearl production
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 areas of the
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Various methods that could be used to determine the geographic origin of cultured pearls, potentially allowing a consumer to trace them back to the farm are reviewed.
DNA Fingerprinting of Pearls to Determine Their Origins
We report the first successful extraction of oyster DNA from a pearl and use it to identify the source oyster species for the three major pearl-producing oyster species Pinctada margaritifera, P.


The Identification of Pearls in Japan : A Status Quo Summary
Detection of gamma irradiated South Sea cultured pearls
The pearl nacre and nucleus are analyzed by separating them for the purposed of providing information about the change of CO2 − radical as growing absorbed doses and it was found out that the signal of CO 2 − radical of the nacre is more distinct than the nucleus.
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Spectral Reflectance and Fluorescence Characteristics of Natural-Color and Heat-Treated "Golden" South Sea Cultured Pearls
114 “GOLDEN” SOUTH SEA CULTURED PEARLS GEMS & GEMOLOGY SUMMER 2001 first marketed in 1993 with full disclosure that they were treated (Vock, 1997). Details of the proprietary process are not known,
This paper is a comparative study on Electron Spin Resonance (ESR) spectra of carbonates such as mollusk shells collected from the Black Sea Coast (Romania), Mediterranean Coast (Cyprus), Tyrrhenian
Spectral reflectance and fluorescence characteristic of natural-color and heat-treated "golden
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