Mineral, Possibly Rock Fragment Containing A Mineral

Sandstone

Quartz Sandstone (predominantly)

Sandstone (River Cobble)

Clastic Sedimentary Rock (primarily Quartz with Feldspar)

Sandstone Concretion

Ferruginous Sandstone Concretion

Conglomerate

Conglomerate (Detrital Sedimentary Rock)

Conglomerate

Conglomerate (clastic sedimentary rock)

Sandstone (Micaceous)

Arenite (composed primarily of SiO2)

Sandstone

Arenite (SiO2 primarily)

Chert (containing a small fossil)

Microcrystalline Quartz (SiO2)

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (Sandstone)

Sandstone (Quartz-rich)

Clastic sedimentary rock (SiO2 primary)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Druzy Quartz (part of a Geode)

Silicon Dioxide (SiO2)

Laterite (iron-rich nodule, possibly Bauxite as a subtype)

Laterite (composed of various minerals including goethite, hematite, gibbsite, etc.)

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

Turquoise

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

Sandstone (Quartz-rich)

Arenite (SiO2 based clastic rock)

Basalt

Basalt (Mafic volcanic rock)

Limestone

Calcium Carbonate (CaCO3)

Red Brecciated Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Shale

Mudstone/Shale

Quartz (Druzy or Geode fragment)

Silicon Dioxide (SiO2)

Conglomerate

Clastic sedimentary rock (Puddingstone)

Granite Pebble

Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)

Sandstone (Weathered Pebble)

Arenite (primarily SiO2)

Quartz in Matrix (possibly Basalt or Siltstone host)

Silicon Dioxide (SiO2) in Host Rock

Sandstone (Pebble)

Clastic sedimentary rock (SiO2 primary)

Unknown Organic Object (likely a berry or fruit)

Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.

Boxwork Siderite or Sepatarian Nodule Weathering

Siderite (FeCO3) with secondary mineralization or Boxwork Geode fragment

Quartz with Iron Staining

Silicon Dioxide (SiO2)

Basalt Porphyry

Porphyritic Basalt

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Sandstone (with carbonaceous plant fragments)

Arenite (composed primarily of SiO2)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Concretion or Geode (unbroken)

Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.

Sandstone (Quartzose)

Arenite (primarily SiO2)

Conglomerate

Conglomerate (clastic sedimentary rock)

Conglomerate

Conglomerate (clastic sedimentary rock)

Granitic Gneiss

Gneiss (containing Potassium Feldspar and Quartz)

Sandstone (with potential Arkose/Lithic characteristics)

Arenite (Sedimentary rock composed of sand-sized grains)