Mica Schist
Schist (Biotite/Muscovite rich)
metamorphic
Category
Industrial Byproduct (Anthropogenic Rock)
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Iron-stained weathered stone (tentative)
Undetermined; possibly weathered iron-rich basalt or concretion
mineral
Banded Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Mica Schist
Schist (Biotite/Muscovite dominant)
metamorphic
Quartz Vein in Host Rock (clastic sediment)
Silicon Dioxide (SiO2) in matrix
sedimentary
Likely weathered river pebble
Indeterminate lithology; possibly fine-grained sandstone, siltstone, or chert
sedimentary
Orange chromium diopside (likely tumbled)
Diopside, CaMgSi₂O₆; orange color may reflect iron-rich composition or surface treatment/inclusion
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Iron-rich or Arkosic)
Arenite (SiO2 with FeO(OH) or Fe2O3 staining)
sedimentary
Biotite Schist
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Graywacke (River Cobble)
Lithic Sandstone (Graywacke)
sedimentary
Zircon
Zircon (Zirconium Silicate - ZrSiO4)
mineral
Conglomeratic breccia
Clast-supported polymictic conglomerate/breccia, cemented by silica- or carbonate-rich matrix
sedimentary
Quartz geode (likely amethyst-bearing)
Silica geode; quartz, SiO₂, with possible amethyst and minor iron oxides
mineral
Quartz Druse (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (Predominantly Muscovite/Biotite)
metamorphic
Sandstone with Secondary Mineral Encrustation
Arenite with Silica/Calcite deposits (SiO2 or CaCO3)
sedimentary
Graphite Schist
C (Carbonaceous Schist)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Pink Quartzite
Quartzite (High-silica metamorphic rock)
metamorphic
Bauxite
Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)
sedimentary
Granitic Pegmatite
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)
Igneous
Diabase (Dolerite) Cobble
Diabase / Dolerite
igneous
Smoky Quartz with Chert
Silicon Dioxide (SiO2)
mineral
Rounded gray-brown river cobble
Indeterminate lithology; possibly weathered quartzite, chert, or fine-grained sandstone
sedimentary
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Granodiorite
Granodiorite (phaneritic intrusive igneous rock)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Scoria (Red Lava Rock)
Scoria
igneous
Concretionary Sandstone
Clastic Sedimentary Rock (Sandstone with secondary mineral cementation)
sedimentary
Quartz Pebble (Geode-like)
Silicon Dioxide (SiO2)
Mineral
Limestone with Calcite Crystals
Sedimentary Rock containing Calcium Carbonate (CaCO3)
sedimentary
Coal (likely Bituminous or Lignite)
Organic Sedimentary Rock (Carbonaceous)
sedimentary
Muscovite Schist
Metamorphic rock primarily composed of quartz and muscovite mica
metamorphic
Iron-rich vesicular rock, possibly slag or basalt
Uncertain; likely basaltic rock (plagioclase–pyroxene–iron oxide) or industrial iron slag
igneous
Red Chert
Microcrystalline Quartz (SiO2)
sedimentary
Mica Schist
Mica Schist (Silicate rock)
metamorphic
River Cobble (likely Serpentinite or Greenstone)
Serpentinite / Greenschist facies rock
metamorphic
Himalayan Pink Salt
Halite (NaCl) with trace minerals
mineral