|  | Division of Geological and Planetary SciencesCalifornia Institute of Technology |  | 
|  | George R. RossmanProfessor of
Mineralogy, emeritus | 

Provides on-line information on the color of minerals; spectra of minerals (VIS, NIR, IR, Raman); Data files as ASCII (wavelength, absorbance) pairs; and an extensive reference list to optical spectra of minerals sorted by mineral and author and references to hydrous components in minerals..