"VWR"

Gray to tan clastic rock made of silt sized particles.

Breccia is a sedimentary rock made up of angular rock fragments.

Bituminous rich black shale for hands-on investigations.

Carbonate rock formed by the precipitation from water.

Scoria is a dark-colored rock formed from lava with a high gas content.

Conglomerate is a sedimentary rock made up rounded quartz pebbles.

Green shale which contains approximately 85% Illite. Impurities may include other clay minerals, such as micas and feldspars.

1 pound of black sand packaged in a heat-sealed bag.