Case Files



HomeBeach ErosionGeologic InfoGeology OutlineGeology Events

MountainsPhoto GalleryResourcesRocks&MineralsVolcanoes

Rocks | Minerals | Other | Test Your Knowledge


Most rocks are aggregates  - made of two or more minerals
Layered Volcanic rock Norite Breccia
Coquina Gabbro with magnification of crystals
Ammonite fossil Vesicular Basalt
Back To Top


Minerals are  naturally occurring inorganic homogeneous solids  with definite physical and chemical properties (not artificial, never alive, made of crystals with a single chemical formula)

Diamond New Jersey State Mineral

Copper Molybdenum
Back To Top


 no crystals not a solid organic or artificial structure

Obsidian Volcanic glass no crystals Human Being
Back To Top
Test your knowledge by observing the following pictures. Using the criteria for a rock , mineral or other decide which substances are minerals, which are rocks and which are something other than a rock or mineral.

Test Your Knowledge Now