Mineral, Specifically A Detrital Grain

Diorite

Diorite (Intermediate intrusive igneous rock)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Diorite

Diorite (Intermediate intrusive igneous rock)

Granite

Granite (Felsic intrusive igneous rock)

Schist

Mica Schist

Sandstone (Weathered Pebble)

Arenite (composed primarily of SiO2)

Basalt

Basalt (extrusive igneous rock)

Banded Gneiss

Gneiss (Metamorphic Rock)

Granite

Granite

Sedimentary rock with quartz veining

Laminated siltstone or mudstone with hydrothermal quartz veins

Bauxite

Bauxite (principal ore of aluminum, primarily Al(OH)3)

Amygdaloidal Basalt

Basalt with Secondary Mineral Infillings

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 cement)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Arenite (Siliclastic Sedimentary Rock)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Sandstone

Arenite

Granite

Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).

Basalt with Quartz Vein and Weathering Crust

Amygdaloidal or Porphyritic Basalt

Sandstone (likely Arkose)

Arenite (composed mainly of SiO2 with Feldspar)

Sandstone (Quartzite Pebble)

Arenite (SiO2)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)

Quartzite River Rock

Quartzite (primarily SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

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.

Sandstone

Sandstone (various mineral compositions)

Gneiss

Gneiss

Amber

Succinite (specifically for Baltic amber); Fossilized Tree Resin (C10H16O)

Potassium Feldspar and Quartz

KAlSi3O8 (Potassium Feldspar) and SiO2 (Quartz)

Sandstone

Arenite

Ironstone Concretion (Nutstone)

Ironstone (with High Limonite/Hematite Content)

White Marble (Whiskey Stone)

Recrystallized Calcite / Marble (CaCO3)

Sandstone

Arenite (SiO2 based)

Ferruginous Sandstone (Gerrit)

Arenite with Iron Oxide cementation

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (Quartz-rich)

Arenite (primarily SiO2)

Sandstone (likely Quartz Sandstone)

Arenite (composed primarily of SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite (SiO2 dominant)