Mineral:  Olivine (Fo41) (Fe+2,Mg)2SiO4

Sample No.:  olivine.4

XRD Analysis:  None.

Chemistry:  Microprobe analysis by W.I. Ridley, USGS, showed good 
Fo41 composition:

SiO2	33.15
TiO2	0.04
Al2O3	0.00
Cr2O3	0.04
MnO	0.90
NiO	0.10
FeO 	47.65
MgO 	18.43
CaO	0.20
Total	100.51
