Not A Rock Or Mineral (Anthropogenic Material)

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)

Sandstone (Ferruginous)

Arenite (with Goethite/Limonite cement)

Chert Geode or Nodule

Microcrystalline Quartz (SiO2)

Chondrite Meteorite

Ordinary Chondrite (L or H Type)

Quartzite with Dark Mineral Inclusions

Quartzite (primarily SiO2) with accessory minerals

Basalt with Secondary Mineralization (Likely Zeolites or Calcite)

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

Milky Quartz Geode Fragment

Silicon Dioxide (SiO2)

Granitic Pegmatite

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

Pyrite in Shale

Iron Sulfide (FeS2)

Desert Rose

Gypsum (variety Selenite) - CaSO4·2H2O

Petrified Wood

Silicified wood (SiO2 - Silicon Dioxide)

Jasper (Brown Iron-Rich Variety)

Silicon Dioxide (SiO2) with Fe2O3 (Iron Oxide/Crystalline Quartz)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Basalt

Mafic Igneous Rock

Quartz in Limonite-rich Matrix

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Quartz (Microcrystalline variety)

Silicon Dioxide (SiO2)

Citrine

Silicon Dioxide (SiO2)

Fossilized Shark Tooth (Basal Bone)

Otodus sp. (Mineralized Hydroxyapatite)

Sandstone

Arenite (composed primarily of SiO2)

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Septarian Nodule

Septarian Concretion (Complex of Calcite, Aragonite, and Limestone/Mudstone)

Sandstone

Arenite (primarily SiO2)

Siltstone with Weathering Rind

Siltstone (composed of microscopic quartz and clay minerals)

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Opalite (Man-made Glass)

Fused glass (typically made of dolomite and metal opacifiers)

Amygdaloidal Basalt with Quartz/Calcite Inclusions

Amygdaloidal Basalt (SiO2 / CaCO3 inclusions)

Pink Feldspar

Orthoclase Feldspar (KAlSi3O8)

Basalt with Quartz Vein

Basalt (SiO2 vein inclusion)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Limonite (Iron Ore)

Limonite; FeO(OH)·nH2O

Orca Agate (Blue Chalcedony)

Silicon Dioxide (SiO2)

Quartzite with inclusions

Metamorphic Rock (Mainly SiO2)

Quartz Geode (Cracked Open)

Quartz (Silicon Dioxide - SiO2)

Lepidolite (in Quartz Matrix)

Lepidolite [K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2]

Chrysocolla on Quartz/Rhyolite matrix

Hydrated copper phyllosilicate mineral: (Cu,Al)2H2Si2O5(OH)4·nH2O