2017
DOI: 10.5741/gems.53.3.286
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Saltwater Pearls from the Pre- to Early Columbian Era: A Gemological and Radiocarbon Dating Study

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Cited by 6 publications
(6 citation statements)
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“…Figure 1 is a binary plot of manganese oxide (MnO) and strontium oxide (SrO). This plot is similar to those previously presented using EDXRF chemical analysis [7][8][9], taking into account that the limit of detection for MnO is higher for EDXRF than for LA-ICP-MS. It was formerly published that the SrO/MnO ratio, measured with EDXRF, is separating freshwater (here presented as filled squares in the figure) from saltwater pearls, as it is >12 for saltwater pearls and <12 for freshwater pearls [8].…”
Section: La-icp-ms Data Are Presented Insupporting
confidence: 87%
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“…Figure 1 is a binary plot of manganese oxide (MnO) and strontium oxide (SrO). This plot is similar to those previously presented using EDXRF chemical analysis [7][8][9], taking into account that the limit of detection for MnO is higher for EDXRF than for LA-ICP-MS. It was formerly published that the SrO/MnO ratio, measured with EDXRF, is separating freshwater (here presented as filled squares in the figure) from saltwater pearls, as it is >12 for saltwater pearls and <12 for freshwater pearls [8].…”
Section: La-icp-ms Data Are Presented Insupporting
confidence: 87%
“…The rest of the studied natural saltwater pearls were six hundred seventy-one samples from Venezuela, part of a private collection. These samples were reportedly collected in the Pre to Early-Colombian Era from P. imbricata and kept in a jar for several years [9]. The pearls also have various shapes, sized from 2.9 to 19.5 mm, weigh from 0.2 to 47.5 carats and their colours vary from white to cream and sometimes light grey and light yellow.…”
Section: Methodsmentioning
confidence: 99%
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“…Trace element analyses were conducted using a Thermo Scientific ARL Quant'x energy-dispersive X-ray fluorescence (EDXRF) spectrometer (cal-ibrated with MACS-1 and MACS-3 carbonate standards) and a Thermo Fisher Scientific iCAP Qc inductively coupled plasma-mass spectrometry, coupled with an Elemental Scientific NWR213 laser ablation system (LA-ICP-MS) (three spots on each sample's surface, 55 μm spot size). More details on these gemological and instrumental methods for the application of pearl identification can be found in previously published papers (Zhou et al, 2017(Zhou et al, , 2019Nilpetploy et al, 2018;Homkrajae et al, 2019;Sturman et al, 2019;Tsai and Zhou, 2020).…”
Section: Methodsmentioning
confidence: 99%