Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Not A Rock Or Mineral
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Granite
Granite
igneous
Quartz Druzy Geode
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (Sandstone)
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Granodiorite Pebble
Granodiorite
igneous
Shale
Lutaceous Rock (Sedimentary Mudrock)
sedimentary
Quartz-bearing Ore (likely Gold-bearing Quartz)
Quartz (SiO2) with potential sulfide mineralization (Pyrite/Arsenopyrite)
mineral/hydrothermal
Concrete Fragment
Hardened Portland cement and mineral aggregate
sedimentary (anthropogenic)
Sandstone
Quartzose Sandstone / Lithic Sandstone
sedimentary
Basalt with Quartz Veining
Basalt (Mafic Volcanic Rock)
igneous
Basalt Pebble
Extrusive Igneous Rock
igneous
Sandstone
Sandstone (SiO2 predominant)
sedimentary
Gray River Pebble (likely Limestone or Siltstone)
Sedimentary Rock (Calcium Carbonate or Siliciclastic)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
sedimentary
Jasper (specifically Yellow or Bumblebee-like Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Magnetite
Magnetite (Fe3O4)
mineral
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Red Sandstone
Sandstone (lithic arenite or arkose with iron oxide)
sedimentary
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
sedimentary
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Weathered quartz-rich rock fragment
Likely quartz-bearing feldspathic rock; exact identification requires testing
mineral
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Basalt
Basalt (composition of plagioclase feldspar and pyroxene)
igneous
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Graywacke type)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Vein-filled Basalt or Diabase Pebble
Mafic igneous rock with quartz/calcite veins
igneous
Pegmatite with Quartz and Feldspar
Intrusive Igneous Rock
igneous
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Coarse-grained Granite
Granitoid (Felsic Plutonic Rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
Igneous
Banded Rhyolite (Wonderstone)
Rhyolite (High-silica volcanic rock)
igneous
Siltstone (Yellow/Brown Sandstone or Siltstone)
Siltstone / Fine-grained Sandstone (rich in iron oxides like limonite)
sedimentary
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Banded Sandstone / Quartzite with Mineral Veins
Sedimentary rock (Quartz arenite with iron oxide/silica banding)
sedimentary
Weathered granitic rock
Granite or granodiorite; primarily quartz (SiO₂), feldspar, and mica
igneous
Granite
Coarse-grained felsic intrusive igneous rock; primarily quartz, alkali feldspar, plagioclase, and biotite/hornblende
igneous