Encyclopedian : Subject Index

Amber	Ammolite	Ammonite
Andesite	Basalt	Calcite
Coal	Corundum	Diamond
Feldspar	Gold	Granite
Gypsum	Lava	List of minerals
Mineral	Mohs scale of mineral hardness	Oil shale
Platinum	Pyrite	Quartz
Silver	Talc	Turquoise