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Table 2 Chemical composition of the pigment

From: Characterization of a Mahamayuri Vidyarajni Sutra excavated in Lu’an, China

Color

Elements detected by SEM–EDS

Raman bands/cm−1

Pigment

Red

Hg, S, Si, Ca, K, O, C

253, 347

Cinnabar

Light red

Pb, O

120, 161, 224, 307, 478, 546

Minium

Green

Cu, Cl, Ca, Si, K, Al, O, C

120, 151, 175, 251, 364, 402, 450, 510, 580, 901, 924, 976

Paratacamite

Blue

Cu, O, C

249, 400, 765, 836, 940, 1095, 1432, 1580

Azurite

White

Pb, Cu, Cl, O, C

1051

Lead white

Gilded material

Au, Ca, K, Fe, O, C

Gold

  1. Major elements are denoted in italics