Mineral (Impactite)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Sandstone (Ferruginous)

Arenite (Siliclastic Sedimentary Rock)

Sandstone (likely Iron-rich or Arkosic)

Arenite (SiO2 with FeO(OH) or Fe2O3 staining)

Quartz (Milky or Iron-Stained)

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Green Sandstone

Glauconitic Sandstone

Pink Marble or Rose Quartz (Likely Pink Marble based on carving texture)

Recrystallized Calcite (CaCO3)

Sandstone (Quartz Arenite)

Sandstone (SiO2 with possible mineral cements)

Iron-Stained Quartz (Riverside Cobble)

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Snowflake Obsidian

Volcanic Glass with Spherulitic Cristobalite (SiO2)

Amazonite

K(AlSi3O8) - Microcline

Green Apophyllite and Stilbite on Quartz Cluster

Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)

Diamond Drill Core (Greenschist and Quartzite)

Chlorite Schist / Meta-quartzite (Metamorphic Rock Core Sample)

Granite

Phaneritic Igneous Rock (composed mostly of Quartz, Feldspar, and Mica)

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

Banded Gneiss

Gneiss

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Peach Aventurine

Silicon Dioxide (SiO2) with inclusions

Malachite

Malachite (Cu2(CO3)(OH)2 - a copper carbonate hydroxide mineral)

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Quartz (Milk Quartz Cobble)

Silicon Dioxide (SiO2)

Chert (with Quartz vein/coating)

Microcrystalline Quartz (SiO2)

Basalt with Granite Inclusions (Xenoliths)

Mafic igneous rock (Basalt) with Sialic minerals

Rutilated Quartz (with Garnet pendant)

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)

Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein

Basalt Porphyry

Porphyritic Basalt

Arfvedsonite (often mistakenly sold as Astrophyllite)

Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]

Blue Lace Agate

Cryptocrystalline Quartz (SiO2) with trace minerals

Shale with Iron Oxide Staining

Fissile Mudstone (primarily clay minerals and quartz)

Sandstone (Quartzose Sandstone)

Arenite

Amygdaloidal Basalt

Amygdaloidal Basalt containing Zeolite and Calcite inclusions

Graphite

Graphite (Native Carbon, C)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz Pebble

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz Druzy on Matrix (likely Agate or Jasper)

Silicon Dioxide (SiO2) with various mineral inclusions

Quartz with Inclusions

Silicon Dioxide (SiO2) with various mineral inclusions

Clay (as a rock-forming material)

Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)

Pyrite in Quartz (Drill Core)

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Chlorite (Small Flakes/Sand)

Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Blue Kyanite

Kyanite (Al2SiO5)

Sandstone (Pebble)

Arenite (primarily SiO2)