Igneous Rock

Basalt, Diorite, Granite, Obsidian, Peridotite

Basalt 1. is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene.

Diorite 2. is a coarse-grained, intrusive igneous rock that contains a mixture of feldspar, pyroxene, hornblende and sometimes quartz.

Granite 3. is a coarse-grained, light colored, intrusive igneous rock that contains mainly quartz and feldspar minerals.

Obsidian 4.  is a dark-colored volcanic glass that forms from the very rapid cooling of molten rock material.

Peridotite 5. is a coarse-grained intrusive igneous rock that is composed almost entirely of olivine.

Sedimentary Rock

Limestone, Breccia, Flint, Rock Salt, Sandstone.

Limestone a rock that is composed primarily of calcium carbonate. It can form organically from the accumulation of shell, coral, algal and fecal debris.

Breccia 2. is a clastic sedimentary rock that is composed of large (over two millimeter diameter) angular fragments.

Flint 3. Flint is a hard, tough chemical or biochemical sedimentary rock that breaks with a conchoidal fracture.

Rock Salt 4. is a chemical sedimentary rock that forms from the evaporation of ocean or saline lake waters.

Sandstone 5. is a clastic sedimentary rock made up mainly of sand-size (1/16 to 2 millimeter diameter) weathering debris.

Metamorphic rocks

Quartzite, Marble, Slate, Soapstone, Amphibolite

Quartzite 1. is a non-foliated metamorphic rock that is produced by the metamorphism of sandstone.

Marble 2. is a non-foliated metamorphic rock that is produced from the metamorphism of limestone.

Slate 3. s a foliated metamorphic rock that is formed through the metamorphism of shale.

Soapstone a metamorphic rock that consists primarily of talc with varying amounts of other minerals such as micas, chlorite, amphiboles, pyroxenes and carbonates.

Amphibolite 5. is a non-foliated metamorphic rock that forms through recrystallization under conditions of high viscosity and directed pressure.