Not A Rock Or Mineral

Banded Sandstone (Liesegang Rings)

Sedimentary Arenite (SiO2 with FeO/Fe2O3 impurities)

Fossiliferous Sandstone (with Brachiopod or Bivalve mold)

Clastic Sedimentary Rock with Macrofossil Mold

Chert Geode or Nodule

Microcrystalline Quartz (SiO2)

Diorite

Diorite (an intrusive igneous rock)

Quartz Druze (Crystalline Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Glauconitic Sandstone

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

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Granitic Pegmatite

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

Basalt with Secondary Mineralization (Likely Zeolites or Calcite)

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

Pyrite in Shale

Iron Sulfide (FeS2)

Basalt

Mafic Igneous Rock

Desert Rose

Gypsum (variety Selenite) - CaSO4·2H2O

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Arenite (SiO2 based)

Sandstone

Arenite (SiO2 principal)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite (SiO2 based)

Quartz in Limonite-rich Matrix

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

Citrine

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Greenschist

Greenschist facies rock

Sandstone

Arenite

Amygdaloidal Basalt with Quartz/Calcite Inclusions

Amygdaloidal Basalt (SiO2 / CaCO3 inclusions)

Limonite (Iron Ore)

Limonite; FeO(OH)·nH2O

Vesicular Basalt (Scoria)

Basalt (Extrusive Igneous Rock)

Basalt with Quartz Vein

Basalt (SiO2 vein inclusion)

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Orca Agate (Blue Chalcedony)

Silicon Dioxide (SiO2)

Quartzite with inclusions

Metamorphic Rock (Mainly SiO2)

Quartz Geode (Cracked Open)

Quartz (Silicon Dioxide - SiO2)

Quartz Vein in Siltstone

SiO2 (Quartz) on clastic sedimentary matrix

Labradorite

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

Chrysocolla in Matrix

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

Quartz-veined Sedimentary Rock

Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)

Collection of Minerals and Ores

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

Quartz (Milky/Clear Variety)

Silicon Dioxide (SiO2)

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Blue Lace Agate

Chalcedony (SiO2) with trace inclusions