Minerals
Used as pencil lead.
What is Graphite?
Usually appears black, non-crystalline, non-vesicular, and glassy.
What is Sandstone?
Non-Foliated, Coarse.
What is Metaconglomerate?
Is magnetic and used in steel.
What is Magnetite?
Low density, fine texture, less than 1 mm crystals, vesicular.
What is Vesicular Rhyolite?
Crystaline, composed of Halite.
What is Rock Salt?
Foliated, fine.
Bubbles with acid when powedered.
What is Dolomite?
Coarse, extremely dense, and made up of Olivine.
What is Dunite?
Inorganic, rounded fragments.
What is Conglomerate?
Various minerals, formed through contact.
What is Hornfels?
Hardness of 7, and used in glass, jewelry, and electronics.
What is Quartz?
Coarse, contains Potassium Feldspar.
What is Granite?
Chemically/Organically formed, composed of Carbon.
What is Bituminous Coal?
Foliated, banding.
What is Gneiss?
The hardness and common colors of Amphibole.
What is black to dark green and 5.5?
Contains Biotite, middle range density, fine, vesicular.
What is Vesicular Andesite?
Composed of Calcite.
Fine to coarse, Quartz.
What is Quartzite?