Sedimentary (Secondary Classification For A Weathered Mineral Specimen)

Sandstone (with banding/weathering)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Bauxite

Bauxite (Al2O3·nH2O)

Diorite (River Pebble)

Intermediate plutonic igneous rock

Trilobite Fossil (Flexicalymene)

Flexicalymene ouzregui

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)

Gold

Native Gold (Au)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)

Moqui Marble

Iron Oxide Concretion

Granite Cobble

Phaneritic Felsic Igneous Rock (Granite)

Turquoise

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

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (SiO2 with assorted lithic fragments)

Granite Pebble (Pink Granite)

Phaneritic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Sandstone (lithic wacke/arenite)

Clastic sedimentary rock (primarily SiO2)

Blue Lace Agate (Geode/Druzy variant)

Chalcedony (SiO2) with Quartz druzy

Quartz Geode

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with iron oxide inclusions (Limonite/Hematite)

Quartz Geode with Calcite

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

Chert (Flint variety)

Silicon Dioxide (SiO2)

Limestone with Quartz/Calcite Veins

Sedimentary Limestone (CaCO3 with SiO2 or CaCO3 intrusions)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon dioxide (SiO2)

Banded Agate (with possible Chalcedony layers)

Silicon dioxide (SiO2)

Rhodochrosite

Manganese Carbonate (MnCO3)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Chalcedony (Yellow Agate/Chert)

Silicon Dioxide (SiO2)

Quartz Druzy Geode

Silicon Dioxide (SiO2) - Crystalline Variety

Fossiliferous Limestone (Crinoidal)

Calcite-bearing bioclastic packstone (CaCO3)

Lepidolite

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

Fluorite

Calcium Fluoride (CaF2)

Quartz (Milky/Chalcedony variety)

Silicon Dioxide (SiO2)

Acicular Azurite (indicated by deep blue, fibrous/fuzzy appearance)

Azurite (Copper Carbonate Hydroxide) - Cu3(CO3)2(OH)2

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Quartz Geode (partially formed/chalcedony with iron staining)

Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides

Sandstone (Ferruginous)

Arenite (Fe-rich)

Turquoise

CuAl6(PO4)4(OH)8·4H2O