Mineral, Often A Rock Given Its Aggregate Nature

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Sulfide Ore (likely Galena and Sphalerite in Quartz)

Lead-Zinc Ore (PbS and ZnS)

Milky Quartz

Silicon Dioxide (SiO₂)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Rose Quartz

Pink Quartz (SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Basalt (Purple-tinted scoria/vesicular variety)

Extrusive mafic igneous rock (SiO2 range 45–52%)

Sandstone (Cross-bedded Drill Core)

Clastic Sedimentary Rock (primarily SiO2)

Ferruginous Sandstone

Arenite with Iron-Oxide cement (primarily Fe2O3 • nH2O)

Red Sandstone

Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Yellow Chert or Jasper

Microcrystalline Quartz (SiO2)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Sandstone (Quartzose type)

Arenite (primarily SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Dumortierite Quartz (Blue Quartz)

Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

Quartz with Iron Oxide Monzonite or Sandstone contact

Quartz (SiO2) with Limonite/Hematite staining

Asphalt (Bituminous Concrete)

Asphaltum / Bitumen-Aggregate Matrix

Sandstone (likely Fossiliferous Sandstone)

Clastic sedimentary rock (primarily SiO2)

Rose Quartz

Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Sandstone

Arenite (primarily SiO2)

Basalt with Magnetite inclusions

Basalt (Mafic silicate rock) potentially containing Magnetite (Fe3O4)

Quartz (Microcrystalline variety)

Silicon Dioxide (SiO2)

Jasper (Multi-color Chert)

Silicon dioxide (SiO2)

Moonstone

Adularia or Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8), specifically with lamellar exsolution of albite and orthoclase.

Calcite

Calcite (CaCO 3)

Sandstone Concretion

Arenaceous concretion (primarily SiO2 with Fe2O3 staining)

Sandstone (specifically Lithic or Quartz Arenite)

Arenite (composed primarily of SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Lepidolite

K(Li,Al)3(Si,Al)4O10(F,OH)2

Quartzite with Chlorite/Epidote

Metamorphosed Quartzite (SiO2)

Granodiorite Pebble

Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite/Amphibole)

Jasper

Silicon dioxide (SiO2) with impurities

Citrine

SiO2 (Silicon Dioxide)

Banded Agate (specifically Sardonyx Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

Granite

Phaneritic plutonic rock (Quartz + Feldspar + Mica)

Sandstone

Arenite

Quartz Pebble

Silicon Dioxide (SiO2)