Igneous Extrusive No Crystals Obsidian Igneous Extrusive No Crystals

Igneous Extrusive Density less than 1 g/cm³ Pumice Igneous Extrusive Density less than 1 g/cm³

Igneous Extrusive Small Crystals Basalt Igneous Extrusive Small Crystals

Igneous Intrusive Large Crystals Granite Igneous Intrusive Large Crystals

Sedimentary Clastic Sand size particles Sandstone Sedimentary Clastic Sand size particles

Sedimentary Clastic Large particles Conglomerate Sedimentary Clastic Large particles

Sedimentary Organic From living organism (coral)

Sedimentary Organic From the remains of animal shells Limestone Sedimentary Organic From the remains of animal shells Color ranges from pinkish (shown) to green-brown

Metamorphic Unfoliated Formed from Sandstone Quartz Metamorphic Unfoliated Formed from Sandstone

Metamorphic Unfoliated Formed from Chalk Marble Metamorphic Unfoliated Formed from Chalk

Metamorphic Foliated From Granite Gneiss Metamorphic Foliated From Granite

Metamorphic Foliated Basalt Schist Metamorphic Foliated Basalt

Metamorphic Foliated Formed from shale Slate Metamorphic Foliated Formed from shale

Sedimentary Clastic Formed from mud or wet soil Shale Sedimentary Clastic Formed from mud or wet soil

Sedimentary Organic Formed from the remains of pine trees Coal Sedimentary Organic Formed from the remains of pine trees

Sulfur Medicine Explosives

Used in lead production Galena Used in lead production

Hematite Used in pigments

Used in pencils as a streak Used as a lubricant Graphite Used in pencils as a streak Used as a lubricant

Building materials Medicine Calcite Building materials Medicine

Talc 26% of talc is used in the production of plastics 0-1 on MOHS hardness scale