Mineral, Often Found As Detrital Grains In Sedimentary Rocks

Magnetite

Magnetite (Fe3O4)

Glauconitic Sandstone

Glauconitic Quartz Arenite (with K,Mg,Fe,Al silicate hydroxide)

Labradorite (a variety of Feldspar)

Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)

Jasper with Quartz

Silicon dioxide (SiO2)

Black Tourmaline (Schorl)

Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)

Glauconitic Sandstone

Glauconitic Quartz-Wacke / Sandstone (Fe(II),Fe(III),Al,Mg)2-3(Si,Al)4O10(OH)2

Sandstone

Sedimentary Rock (Quartz arenite/Arkose)

Magnetite

Magnetite (Fe3O4)

Sandstone

Sandstone (SiO2-rich detrital sedimentary rock)

Coarse Sand or Fine Gravel

Detrital Sedimentary Fragments (mostly SiO2)

Muscovite

Muscovite (KAl2(AlSi3O10)(OH)2)

Sandstone (Pebble)

Sandstone (arenite, arkose, wacke depending on composition)

Sandstone

Clastic Sedimentary Rock

Conglomerate

Conglomerate (Detrital sedimentary rock)

Sandstone

Clastic Sedimentary Rock

Siltstone

Siltstone (Detrital Sedimentary Rock)

Conglomerate

Conglomerate (Detrital sedimentary rock)

Quartz Pebble

Silicon Dioxide (SiO2)

Potassium Feldspar and Quartz

KAlSi3O8 (Potassium Feldspar) and SiO2 (Quartz)

Conglomerate

Conglomerate (Detrital sedimentary rock)

Muscovite

KAl2(AlSi3O10)(OH)2

Quartz (Small Pebble)

Silicon Dioxide (SiO2)

Quartz Sandstone

Quartz Arenite

Quartz (Grain/Pebble)

Silicon Dioxide (SiO2)

Mica (likely Muscovite)

Muscovite / KAl2(AlSi3O10)(OH)2

Conglomerate

Conglomerate (Detrital sedimentary rock)

Quartz (Grain)

Silicon Dioxide (SiO2)

Quartz

Quartz (Silicon Dioxide - SiO2)

Jasper and Quartz Pebble

Silicon dioxide (SiO2) microcrystalline quartz

Ironstone (likely Limonite or Goethite nodule)

Hydrothermally altered Ferric Hydroxide (FeO(OH)·nH2O)

Limonite (Iron Ore Congcretion)

Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)

Conglomerate

Conglomerate rock (detrital sedimentary)

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Pink Feldspar

Potassium Feldspar (Microcline or Orthoclase), KAlSi3O8

Shale

Fissile mudrock (composed of clay-sized particles and detrital grains)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Granitic Sand

Detrital sediment (predominantly Quartz, Feldspar, and Mica)

Feldspar (Potassium Feldspar / Orthoclase)

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

Chert

Chert (SiO2)

Conglomerate

Conglomerate (Detrital Sedimentary Rock)