Question: Quartzite

Answer: Texture: Non-Foliated, Medium-Coarse Grained

Composition: Siliceous

Minerals: Mostly quartz. Some feldspar or mica

Precursor: Regional or Contact

Parent: Quartz Sandstone

Question: Quartzite ID

Answer: Foliate: No

Harder than glass: Yes

Question: Marble

Answer: Texture: Non-Foliated, Medium-Coarse Grained

Composition: Calcareous

Minerals: Calcite or Dolomite

Precursor: Regional or Contact

Parent: Limestone or Dolostone

Question: Marble ID

Answer: Foliate: No

Harder than glass: No

Reacts with HCI: Yes

Question: Amphibolite

Answer: Texture: Foliated, Medium Grained

Composition: Amphibole and Plagioclase

Minerals: Amphibole

Precursor: Regional

Parent: Basalt- Mafic Igneous Rock