Mineral Side Rock

Sandstone

Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)

Gold-Bearing Quartz

Silicon Dioxide with Native Gold (SiO2 + Au)

Sandstone (Gneissic or Banded)

Clastic Sedimentary Rock (composed predominantly of SiO2)

Pyrite-rich Ore

Pyrite (FeS2) with secondary minerals

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based)

River Cobble (likely Sandstone or Siltstone type)

Sandstone or Siltstone (common rock types that form river cobbles)

Granite

Granite (Felsic Plutonic Rock)

Lapis Lazuli

Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)

Quartz Pebble (with Iron Staining)

Crystalline Silicon Dioxide (SiO2)

Sandstone with Dendritic Manganese Oxides

Sandstone (SiO2 predominant) with Oxide Dendrites (MnO2)

Herkimer Diamond in Matrix

Quartz (SiO2) in Dolostone (CaMg(CO3)2)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (SiO2 major component)

Sandstone (Quartzose Sandstone)

Arenite (SiO2)

Granitic Gneiss

Gneiss (Metamorphic rock of granitic composition)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Sandstone (Quartzite-rich Pebble)

Arenite (primarily SiO2)

Basalt with Secondary Mineralization (Likely Zeolites or Calcite)

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

Sandstone (Quartzose)

Arenite (SiO2 based)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Peach Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8) with inclusions

Granodiorite

Granodiorite (Intermediate intrusive igneous rock)

Granite (with alteration)

Granite (Felsic intrusive igneous rock)

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)

Fluorite Carving

Fluorite (Calcium Fluoride, CaF2)

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)

Milky Quartz in Epidote Host Rock

Crystalline Silicon Dioxide (SiO2) with Epidote Ca2(Al,Fe)3(SiO4)3(OH)

Banded Agate (Polished Slice)

Chalcedony (cryptocrystalline Quartz), SiO2

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Turquoise

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

Granite Sand (Decomposed Granite)

Grus / Quartz-Feldspar Detritus

Iron Concretion

Ferruginous concretion (Fe2O3·nH2O / FeO(OH))

Banded Quartz

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix

Sandstone (Ferruginous)

Arenite with Iron oxide staining (SiO2 with Fe2O3)

Sandstone (Quartzose)

Arenite (SiO2 based)

Lapis Lazuli (Raw Ore)

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Diorite

Diorite (Intermediate intrusive igneous rock)

Quartz Druzy on Geode Fragment

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)