Ferruginous Sandstone
Arenite with Iron-Oxide cement (Fe2O3 · nH2O)
sedimentary
Category
Sedimentary And Igneous
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Brown Sandstone
Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)
sedimentary
Fragmented Sedimentary Pebble
Clastic Sedimentary Specimen
sedimentary
Granite
Granite (a plutonic rock)
Igneous
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
Mineral
Quartz with Mica (Muscovite or Biotite)
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Limonite (Iron Ore/Hydrated Iron Oxide)
Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))
Mineral
Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Chalcopyrite
Chalcopyrite (CuFeS2)
Mineral
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Blue Quartz
Quartz (SiO2) with inclusions
Mineral
Serafina (Serafinite / Clinochlore)
Clinochlore (Mg5Al)(AlSi3O10)(OH)8
mineral
Quartz pebble with iron inclusion
Silicon Dioxide (SiO2)
mineral
Quartz / Feldspar Specimen
SiO2 (Quartz) / KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar Group)
mineral
Black Tourmaline (Schorl)
NaFe3+3Al6(BO3)3Si6O18(OH)4
mineral
Clear Quartz (Faceted)
Silicon dioxide (SiO2)
gemstone
Labradorite
(Ca, Na)(Al, Si)4O8 (Calcium Sodium Aluminum Silicate)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
gemstone
Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)
Mixed Silicates and Sulfides (SiO2, FeS2)
mineral
Quartz with inclusions
SiO2
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Ocean Jasper
Orbicular Jasper / Silicate
Mineral
Weathered Sandstone Cobble
Arenite / Quartz Sandstone
sedimentary
Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Shale
Clastic Sedimentary Rock
sedimentary
Shale (sub-type: Carbonaceous Shale)
Lutaceous Sedimentary Rock
sedimentary
Fossiliferous Shale
Sedimentary Clastic Rock with fossil inclusions (likely Brachiopod or Bivalve impressions)
fossil
Shale
Laminated Fissile Pelite
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Quartz (chalcedony variety) or Limestone with Quartz Veins
SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)
Mineral or Sedimentary Rock (with mineral inclusions)
Sandstone
Arenite
sedimentary
Shale
Argillite / Shale
sedimentary
Sandstone
Arenite
sedimentary
Silty Shale
Silty Shale (Fissile Sedimentary Rock)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Shale (Ferruginous)
Laminated Mudrock (Siliciclastic Sedimentary Rock)
sedimentary
Shale
Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Shale (with Iron Oxide staining)
Fissile Mudstone (primarily Quartz and Clay minerals)
sedimentary