This Is Not A Rock Or Mineral

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

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.

Granite (Pink/Red)

Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)

Quartz Druzy (on Matrix)

Silicon Dioxide (SiO2)

Peridotite (with Olivine and Pyroxene)

Ultramafic Magmatic Rock (Primary minerals: (Mg, Fe)2SiO4 and (Ca, Mg, Fe)2Si2O6)

Pink Feldspar

Orthoclase Feldspar (KAlSi3O8)

Biotite (Black Mica)

Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite: KAl2(AlSi3O10)(OH)2

Smoky Quartz

Smoky Quartz (SiO2: Silicon Dioxide)

Granite (Alkali-feldspar Granite)

Felsic Plutonic Rock (Primary minerals: Quartz SiO2, Orthoclase KAlSi3O8, Plagioclase (Na,Ca)AlSi3O8)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Quartz Geode

Silicon Dioxide (SiO2) in Host Rock

Green glass sphere/marble

Soda-lime glass (primarily SiO2, Na2O, CaO)

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Sandstone with Iron Oxide (Limonite/Hematite)

Ferruginous Sandstone (SiO2 with FeO(OH)·nH2O)

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)

Druzy Quartz on Matrix

Silicon Dioxide (SiO2)

Epidote

Epidote (formula: Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Biotite Mica in Host Rock

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)

Breccia

Breccia - Clastic sedimentary rock

Biotite (Black Mica)

Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Amygdaloidal Basalt

Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)

Montana Moss Agate

Chalcedony (SiO2) with Manganese/Iron oxide inclusions

Biotite (Mica)

Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)

Amygdaloidal Basalt

Vesicular-Amygdaloidal Basalt (Mafic Extrusive)

Greywacke with Quartz Veins

Lithic Sandstone (Greywacke) with SiO2 inclusions

Hypersthene (or Enstatite/Ferrosilite)

Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)

Dendritic Agate

Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)

Basalt with Quartz Veins

Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with SiO2 inclusions

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Quartz Geode Segment

Crystalline Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Epidote

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic extrusive volcanic rock with secondary mineral infilling)