Metamorphic Rock (Specifically A Rock Composed Of Minerals)

Serpentinite

Serpentinite ((Mg,Fe,Ni,Al)3Si2O5(OH)4)

Unakite

Epidotized Granite

Quartzite (Ferruginous)

Quartzite (major component SiO2 with Fe2O3 impurities)

Quartzite with Quartz Veins

Quartzite (chiefly SiO2)

Unakite

Unakite epidotized granite

Unakite

Epidotized Granite

Unakite

Epidotized Granite

Amygdaloidal Basalt

Amygdaloidal Basalt containing Zeolite or Quartz (SiO2/Silicates)

Iron Meteorite (Individual)

Siderite (composed of Kamacite and Taenite minerals)

Rough Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Granite (Pink/Red Orthoclase variety)

Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (predominantly SiO2)

Quartzite Pebbler

Quartzite (mainly SiO2)

Unakite

Epidotized Granite

Unakite

Unakite (Metasomatized Granodiorite)

Quartzite River Pebble

Quartzite (primarily SiO2)

Quartzite (Quartz-rich Cobble)

Quartzite (SiO2)

Unakite

Epidotized Granite

Quartzite

Quartzite (primarily SiO2)

Unakite

Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH) and KAlSi3O8)

Unakite

Unakite Lepidolite

Diorite

Diorite (Intermediate intrusive igneous rock)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Granite

Granite (Felsic Plutonic Rock)

Granite

Phaneritic Felsic Igneous Rock

Sandstone (Ferruginous)

Arenite (Fe2O3 enriched)

Larvikite

Monzonite (intermediate intrusive igneous rock containing plagioclase, alkali feldspar, augite, and biotite)

Ruby (Pink to Red Corundum)

Al2O3 (Corundum with Chromium impurities)

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Pegmatite

Coarse-grained Igneous Rock (Granitic Pegmatite)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Sulfur (in host rock)

Native Sulfur (S8)

Red Granite

Phaneritic Felsic Intrusive Igneous Rock (primarily K-feldspar, Quartz, and Biotite)

Granite (likely a river or beach pebble)

Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Travertine (Tufa)

Chemical Sedimentary Limestone (CaCO3)

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Granite

Granite (Felsic Intrusive Igneous Rock)

Turquoise (set in silver jewelry)

Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)

Turquoise

CuAl6(PO4)4(OH)8·4H2O