| http://www.w3.org/ns/prov#value | - Several other jade items were found in nearby tombs, all with the green-tinted stucco into which pieces of jade were set.Archaeologists and other researchers previously believed the green pigment was derived from malachite or chrysocolla, but that assumption was recently refuted when the pigment was analyzed with X-ray diffraction, proton-induced X-ray emission and a scanning electron microscope.
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