Sandstone
Arenite (SiO2 based)
sedimentary
Category
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Sandstone (Banded)
Clastic Sedimentary Rock: Arenite
sedimentary
Granite
Intrusive igneous rock
igneous
Quartz with inclusions (likely Chlorite or Hornblende) and country rock
SiO2 (Quartz) with associated ferromagnesian minerals
Mineral/Igneous/Metamorphic association
Sandstone
Clastic Sedimentary Rock
sedimentary
Red Sandstone (with possible iron oxide staining)
Sandstone (primarily Quartz with Hematite/Goethite cement)
sedimentary
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Basalt
Mafic Igneous Rock (composed primarily of pyroxene and calcium-rich plagioclase)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Dyed Dalmatian Stone
Aplite (Alkali-feldspar granite) with Arfvedsonite
igneous
Fluorite on Matrix
Calcium Fluoride (CaF2)
mineral
Sandstone
Sedimentary Rock (Quartz arenite or arkose)
sedimentary
Sandstone (with potential fossil fragments)
Sandstone (SiO2 dominated with iron oxides)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Fossil Snail
Gastropoda (fossilized)
fossil
Granite with Pyrite or Mica
Phaneritic intrusive igneous rock
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Quartz in Matrix (Lepidolite or Quartzite)
Silicon Dioxide (SiO2) with host rock
mineral
Jasper and Chalcedony
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Porphyritic Basalt (with Pyrolusite or Iron-oxide staining)
Porphyritic Basalt (Mafic Extrusive)
igneous
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone (Picture Sandstone)
Arenite (primarily SiO2)
sedimentary
Shale
Fissile Siliciclastic Sedimentary Rock
sedimentary
Gneiss (Banded Gneiss Cobble)
Gneiss
metamorphic
Druzy Quartz Geode (Oco or Moroccan variety)
Silicon Dioxide (SiO2)
mineral
Granite
Intrusive Felsic Igneous Rock
igneous
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Sandstone
Arenite (primary component SiO2)
sedimentary
Gneiss (with Quartzite and Biotite)
Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)
metamorphic
Quartz and Iron Oxide
Quartz (Silicon Dioxide, SiO2) with possible Limonite/Hematite inclusions
mineral
Sandstone
Sedimentary Rock (Quartz Arenite)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartz cluster, possibly druzy quartz on matrix
Quartz (SiO₂), likely microcrystalline to coarse crystalline; associated matrix uncertain
mineral
Gneiss
Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Sandstone
Quartz Arenite / Sedimentary Rock
sedimentary
Fluorite on Matrix
Calcium Fluoride (CaF2)
mineral