Labradorite (in Larvikite or Gabbro)
Plagioclase Feldspar (containing (Ca, Na)(Al, Si)4O8)
igneous
Category
Igneous And Sedimentary
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Granitoid (Granite/Diorite)
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica/Amphiboles)
igneous
Muscovite Mica (Granitic Pegmatite)
Muscovite - KAl2(AlSi3O10)(OH)2
igneous
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Sandstone (with carbonaceous plant fragments)
Arenite (composed primarily of SiO2)
sedimentary
Shale
Fissile Siliciclastic Sedimentary Rock
sedimentary
Migmatite
Migmatite (Mixed Rock)
metamorphic
Mica-rich Pegmatite
Pegmatite (rich in Muscovite and Biotite)
igneous
Schorl (Black Tourmaline) in Granite
NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
igneous
Granite
Phaneritic Igneous Rock (Granite)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Granite
Granite (dominated by Quartz, Alkali Feldspar, and Plagioclase)
igneous
Pink Granite (Potassium-rich)
Phaneritic Felsic Igneous Rock (K-Feldspar Granite)
igneous
Granite
Granite (composed of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Black Obsidian
Obsidian (Volcanic Glass)
igneous
Granite
Granite (Phaneritic Quartz-rich Igneous Rock)
igneous
Snowflake Obsidian
Spherulitic Volcanic Glass (SiO2 + impurities)
igneous
Indigo Gabbro (also known as Mystic Merlinite)
Gabbro (composed of Plagioclase Feldspar, Pyroxene, and minor Magnetite/Ilmenite)
igneous
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
igneous
Garnet Rhyolite
Rhyolite (high-silica volcanic rock) with almandine/spessartine garnet
igneous
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
igneous
Dyed Dalmatian Jasper (Dalmatian Stone)
Perthitic Feldspar with Arfvedsonite inclusions
igneous
Dalmatian Jasper
Peralkaline Quartz-Feldspar Igneous Rock
igneous
Sandstone
Arenite
Sedimentary
Peridotite (Olivine/Peridot)
Peridotite (comprising (Mg,Fe)2SiO4)
igneous
Greenstone / Epidosite
Metamorphosed Mafic Igneous Rock (Epidote-Chlorite group)
metamorphic
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Amygdaloidal Basalt with Zeolite/Quartz Infill
Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)
igneous
Basalt
Basaltic Mafic Rock
igneous
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Metamorphic or Igneous (context dependent)
Chert
Silicon dioxide (SiO2)
sedimentary
Milky Quartz
Quartz (SiO₂)
Mineral
Greenschist
Greenschist facies rock
Metamorphic
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
Quartz
Quartz (SiO2)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Iron, or Manganese
mineral
Strawberry Quartz (Aventurine)
Silicon Dioxide with Hematite/Lepidocrocite inclusions (SiO2)
mineral