Studies in Conservation · 2002 · 10 citations · 6 references
Natural SciencesArchaeologyEarth SciencesMineralogyPrehistoric ArchaeologyVertebrate PaleontologyArchaeological ContextNeolithic ArchaeologyLaboratory Coreflood ExperimentsMicro X-ray FluorescenceX-ray Diffraction Analysis
Three turquoise-blue beads from a Syrian neolithic site, Tell el-Kerkh, were investigated by micro X-ray fluorescence. Fourier transform infrared spectroscopy, X-ray diffraction, spectrophotometry and scanning electron microscopy. The results from the analyses and laboratory experiments indicated that the blue beads were and alternative to and imitation of natural turquoise beads. They are formed of and apatite core with a turquoise colour obtained probably by the heating of manganese or iron compounds. The microstructure and chemical composition of the beads indicates the use of mammal tooth or tusk, possible 'odontolite' (fossil ivory). The technique used to produce these blue beads is a precursor to the development of glazing.
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H Newesely · Applied Geochemistry · 1989 · 83 citations
The Earliest Levels at Yarim Tepe I and Yarim Tepe II in Northern Iraq
N. Ya. Merpert, R. M. Munchaev · Iraq · 1987 · 46 citations
From mastodon ivory to gemstone: The origin of turquoise color in odontolite
Ina Reiche, Colette Vignaud, B. Champagnon et al. · American Mineralogist · 2001 · 37 citations