ROCKS.

This is an example of gneiss. Gneiss, a metamorphic rock, is usually formed of the same composition as granite. It usually has bands of color going around it. It is named for its texture rather than its composition. It is a very common rock found where there are or were mountains.

Basalt, pictured above, is an example of an igneous rock. It is formed from the fast cooling of basaltic lava exposed at or close to the surface of a planet or moon. It is made up of less than twenty percent of quartz and less than ten percent feldspathoid. It commonly erupts on earth's moon, Mars, Venus, and even an asteroid. It underlies the earth's surface more than any other rock type. 

This is shale, a sedimentary rock. It is made up of clay minerals mixed with particles of other minerals such as quartz and calcite. It is the most common sedimentary rock, known for its flakey texture. 

Aramayorite is a rare mineral. It is composed tin and bismuth. It can be found in Bolivia.