Tennantite Copper Iron Arsenic Sulphide

Tennantite Tetrahedra on Quartz

iron 03

Hectorite Hydrous magnesium iron silicate

Griphite sodium aluminum calcium iron manganese phosphate

iron tip plough

strike while the iron is hot

Epidot w rock Calcium aluminum iron silicate

environmental hazard label

1881 electric iron

Halotrichite Hydrous iron aluminum sulfate

ironclads 1862

Amphibole Nephrite Jade Basic calcium magnesium iron silicate

ironing board and iron

Biotite basic potassium magnesium iron aluminum silicate

Center for Environmental Excellence shield

Boehmite w minor mixture of other aluminum and iron oxides

iron 04

Adirondack Black Bear

early iron plow

iron age implements

Jarosite on quartz Potassium iron sulfate

Chironia frutescens Shrubby Chironia

Environmental Protection Agency logo