Orthoclase

Origin: Delmo Lake Pegmatite, near Butte, Silver Bow Co., Montana, U.S.A.

Sample size: 3.7 x 3.4 x 9.8 cm

Variety valencianite with minor quartz and calcite

Origin: Valenciana Mine, Guanajuato, Mun. de Guanajuato, Guanajuato, Mexico

Sample size: 10.2 x 7.4 x 4.3 cm

Photo courtesy of:

Dan Weinrich

Origin: Itrongay, Madagascar

Sample size: 4.5 x 4 x 2 cm

Orthoclase with some pearlescent 1 cm stilbite perched on it

Origin: La Fibbia, Gotthard Pass, Switzerland
Ex. Eric Asselborn collection

Sample size: 13.5 x 6.8 x 6.0 cm

Photo courtesy of:

Rob Lavinsky

SEM images

TEM images

vibrational spectra description

IR spectra

Raman spectra

N-IR spectra

F-IR spectra

IES spectra