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Table 1 Results of grave goods analyses by SEM-EDX and μXRD

From: Study of color pigments associated to archaic chinchorro mummies and grave goods in Northern Chile (7000–3500 B.P.)

Color Sample Site Description SEM-EDX Grain shape X-ray diffraction
Black M1 CA15-C Pigment in a shell Mn, Si, Ca, K, Al, Fe, Mg, Cl, S, Na Manganese crystals not clearly observed (mixed with the other compounds) Cryptomelane, quartz, anhydrite, calcite, diopside
M17 MO-1 Tumba 25 Cuerpo 5 Pigment in a shell Mn, K, Si, Ca, Cl, Al, P, S, Na Manganese as 2-3 μm long grains Cryptomelane, halite, quartz, calcite, albite
Red M1 MASMA-1 Raw Pigment Fe, Si, Al, Ca, Cl, Na, trace of As Hematite spherical grains, 10 μm in diameter or ovoide grains (1 μm thick) Hematite, halite, kaolinite?
M8 CA15-C, Cuerpo 3 Raw pigment Fe, Si, Al, Cl, K, S, Na, trace of As Hematite spherical grains, 1 μm in diameter Hematite, goethite, halite, quartz, calcite
M10 COLON-10 Pigment in a shell Si, Fe, Ca, S, Al, Cl, K, Na, trace of As Hematite ovoid grains, 1 μm thick Hematite, quartz, halite, anhydrite
M11 MASMA Pigment on a griding stone Fe, Si, Ca, Al, Cl, trace of As Hematite pherical grains, 10 μm in diameter or ovoide grains, 1 μm thick Hematite, halite, kaolinite
M13 CA15-C Powder in a leather pouch Si, S, Fe, Ca, Al, Cl, Na, trace of As Hematite cryslats with facets, 2-7 μm long and ovoid grains (1 μm thick) Hematite, quartz, calcite, halite
M14 CA15-D Raw pigment Fe, Si, Al, K, Na, Cl, Ca, trace of As Hematite spherical grains, 10 μm in diameter or ovoide grains (1 μm thick) Hematite, halite, diopside? illite?
M16 CHIN-4 Raw pigment Fe, Si, Al, S, P, K, Na, Ca Hematite ovoid grains, 1 μm thick Hematite, gypsum, quarz, halite, calcite?