Shale or Siltstone
Sedimentary Clastic Rock (Variable mineral composition including quartz and clay minerals)
sedimentary
Category
Not A Rock Or Mineral
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Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Carnelian
Carnelian (Microcrystalline Quartz, SiO2)
mineral
Granite (Pink/Red)
Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)
igneous
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pink Feldspar
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Hypersthene
Hypersthene ((Mg,Fe)SiO₃)
Mineral
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
mineral
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Feldspar (Plagioclase / Orthoclase)
KAlSi3O8 / CaAl2Si2O8 - NaAlSi3O8
mineral
Breccia
Breccia - Clastic sedimentary rock
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite: KAl2(AlSi3O10)(OH)2
mineral
Veined basalt (likely basalt with quartz/calcite vein)
Basalt, aphanitic mafic volcanic rock; vein minerals likely quartz (SiO₂) or calcite (CaCO₃)
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Peridotite (with Olivine and Pyroxene)
Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)
igneous
K-Feldspar / Granite Pegmatite
Potassium Feldspar (Microcline/Orthoclase) with Quartz
igneous
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Smoky Quartz
Smoky Quartz (SiO2: Silicon Dioxide)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron inclusions
mineral
Pebble (likely a type of sandstone or quartzite pebble)
Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.
Sedimentary rock
Pink Granite / K-Feldspar
Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)
igneous
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Garnet Schist
Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)
metamorphic
Granite (Alkali-feldspar Granite)
Felsic Plutonic Rock (Primary minerals: Quartz SiO2, Orthoclase KAlSi3O8, Plagioclase (Na,Ca)AlSi3O8)
igneous
Sandstone with Iron Oxide (Limonite/Hematite)
Ferruginous Sandstone (SiO2 with FeO(OH)·nH2O)
sedimentary
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Limestone with Calcite Veins
Calcium Carbonate (CaCO3)
sedimentary
Epidote
Epidote (formula: Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Zebra Stone
Siltstone (Argillaceous Siltstone)
sedimentary
Biotite Mica in Host Rock
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)
mineral