Mineral, Specifically A Rock Fragment

Chert Geode or Nodule

Microcrystalline Quartz (SiO2)

Diorite

Diorite (an intrusive igneous rock)

Quartz Druze (Crystalline Quartz)

Silicon Dioxide (SiO2)

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Glauconitic Sandstone

Glauconitic Sandstone (contains (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Basalt with Secondary Mineralization (Likely Zeolites or Calcite)

Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)

Calcite

Calcite (CaCO3)

Granitic Pegmatite

Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)

Pyrite in Shale

Iron Sulfide (FeS2)

Quartz in Limonite-rich Matrix

Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Basalt

Mafic Igneous Rock

Citrine

Silicon Dioxide (SiO2)

Chert (specifically a stream-worn Chert Nodule)

Sedimentary Cryptocrystalline Quartz (SiO2)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Coquina

Biogenic Limestone (Calcite, CaCO3)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Greenschist

Greenschist facies rock

Pink Feldspar

Orthoclase Feldspar (KAlSi3O8)

Amygdaloidal Basalt with Quartz/Calcite Inclusions

Amygdaloidal Basalt (SiO2 / CaCO3 inclusions)

Basalt with Quartz Vein

Basalt (SiO2 vein inclusion)

Limonite (Iron Ore)

Limonite; FeO(OH)·nH2O

Orca Agate (Blue Chalcedony)

Silicon Dioxide (SiO2)

Vesicular Basalt (Scoria)

Basalt (Extrusive Igneous Rock)

Quartzite with inclusions

Metamorphic Rock (Mainly SiO2)

Quartz Geode (Cracked Open)

Quartz (Silicon Dioxide - SiO2)

Collection of Minerals and Ores

Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)

Quartz Vein in Siltstone

SiO2 (Quartz) on clastic sedimentary matrix

Labradorite

Labradorite (Ca, Na)(Al, Si)4O8

Coquina

Biogenic Limestone (mostly Calcium Carbonate, CaCO3)

Chrysocolla in Matrix

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4' nH2O on Quartz/Feldspar matrix

Quartz (Milky/Clear Variety)

Silicon Dioxide (SiO2)

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Blue Lace Agate

Chalcedony (SiO2) with trace inclusions

White Marble

Recrystallized Calcite (CaCO3)

Synthetic Wolf Plush (Non-mineral)

Canis lupus similis (Prop material: Polyester & Synthetic fibers)

Quartz Veinated Sandstone or Siltstone

Silicon Dioxide (SiO2) within a clastic sedimentary matrix

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Basalt with Calcite Veins

Basalt (containing CaCO3 inclusions)

Desert Rose

Gypsum (variety Selenite) or Barite, CaSO4·2H2O