Orpiment

Origin: Kurdistan, Luchumi arsenic deposit, Ambrolauri region, Georgia

Sample size: 9.2 x 6.8 x 4.8 cm

Botryoidal orpiment

Origin: Shimen Mine, Hunan Province, China

Sample size: 12.0 x 8.5 x 3.3 cm

Photo courtesy of:

Rob Lavinsky

Orpiment on barite

Origin: Elbrusskiy Mine, Northern Caucasus Region, Russia

Sample size: 29 x 18 x 14 mm (top), 28 x 20 x 8 mm (bottom)

Origin: Quiruvilca Mine, Santiago de Chuco Prov., La Libertad Dept., Peru

Sample size: 6.5 x 5.7 x 3 cm (top), 4.2 x 3.6 x 3.5 cm (2nd/bottom row)

Photo courtesy of:

Dan Weinrich

SEM images

TEM images

vibrational spectra description

IR spectra

Raman spectra

N-IR spectra

F-IR spectra

IES spectra