Metamorphic Rock (Primarily Composed Of Minerals)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Gneiss (Schistose)

Gneiss

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Mica Schist with Iron Staining

Mica Schist

Gneiss

Gneiss (High-grade metamorphic rock)

Schist

Mica Schist (primarily Muscovite and Quartz)

Basalt

Basalt (Mafic volcanic rock)

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Green Quartzite (Aventurine-like)

Quartzite (primarily SiO2 with chromium-rich mica or chlorite inclusions)

Greenstone

Greenschist (primarily composed of chlorite, actinolite, and epidote)

Schist

Mica Schist

Orthoclase Feldspar (Salmon variety)

Orthoclase, KAlSi3O8

Gneiss (with Quartz and Biotite Mica)

Gneiss

Lapis Lazuli

Complex mixture of minerals (lazurite, calcite, pyrite, and sodalite); (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Gneiss

Foliated Metamorphic Rock (Gneiss)

Blue Quartzite

Quartzite (primarily SiO2) with inclusions like Dumortierite or Magnesio-riebeckite

Greenschist

Greenschist (Chlorite Schist)

Orange Calcite

Calcium Carbonate (CaCO3)

Copper-bearing Mica Schist

Mica Schist with Native Copper inclusions

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Unakite (Epidotized Granite)

Unakite (Rock composed of Epidote Ca2(Al,Fe)3(SiO4)3(OH), Orthoclase KAlSi3O8, and Quartz SiO2)

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Gneiss (with Mica and Quartz)

Gneissic Metamorphic Rock

Sandstone

Arenite (Clastic Sedimentary Rock)

Schist

Mica Schist (primarily consisting of muscovite KAl2(AlSi3O10)(OH)2 or biotite K(Mg,Fe)3(AlSi3O10)(OH)2)

Gneiss (Cobble)

Gneiss

Gneiss (specifically Granitic Gneiss)

Gneissic Metamorphic Rock

Mookaite Jasper

Silicified Radiolarite (SiO2)

Pink Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

Flagstone (Sandstone)

Clastic Sedimentary Rock (composed of quartz and feldspar)

Granite Pebble

Granite (Phaneritic intrusive igneous rock)

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4

Greenschist

Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)

Granite

Granite (a common rock type, not a single mineral species)

Gneiss

Gneiss (High-grade metamorphic rock)

Sandstone (Ferruginous)

Arenite with Iron-oxide inclusions (SiO2 primarily)

Lapis Lazuli

Lapis lazuli (a metamorphic rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Mica Schist with Pyrite

Muscovite/Biotite Schist with Iron Sulfide (FeS2)

Desert Varnish (on Sandstone)

Rock Varnish (composed of Manganese oxides, Iron oxides, and Clay minerals)