Mineral Or Sedimentary Rock (With Mineral Inclusions)

Chert (specifically Blue Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Milky Quartz

Quartz (Silica / Silicon Dioxide, SiO2)

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8

Sandstone (Pebble)

Arenite (primarily SiO2)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)

Sandstone (Quartz-rich)

Arenite (composed primarily of SiO2)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Milky Quartz (with Chlorite/Mineral Inclusions)

Silicon Dioxide (SiO2)

Quartz (Milky or Druzy Quartz)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Marble

Recrystallized Calcite (CaCO3) Rock

Granite (with Almandine Garnet inclusions)

Granite composed primarily of Quartz (SiO2), K-Feldspar (KAlSi3O8), and Almandine Garnet (Fe3Al2(SiO4)3)

Conglomerate (Puddingstone)

Conglomerate (specifically, clastic sedimentary rock)

Sandstone (Weathered Pebble)

Arenite (primarily SiO2)

Schist

N/A (a rock type, not a mineral formula)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Gneiss (Banded Gneiss)

Gneiss

Schist

Chlorite/Mica Schist

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Conglomerate

Conglomerate (Sedimentary rock)

Aventurine (Green Aventurine)

Quartz with Fuchsite Inclusions (SiO2)

Sandstone

Arenite (predominantly SiO2)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Shale

Fissile Mudstone

Sandstone (Ferruginous)

Arenite (complex silicate composition with iron oxides)

Ferruginous Sandstone

Arenite with Iron-Oxide cement (Fe2O3 · nH2O)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Agate

Silicon dioxide (SiO2)

Agate

Silicon Dioxide (SiO2) - variety: Chalcedony

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Chert

Chert (microcrystalline quartz, SiO2)

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Turquoise

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

Herkimer Diamond (Quartz Crystal)

Silicon Dioxide (SiO2)

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

Sandstone (Ferruginous/Banded)

Clastic Terrigenous Sandstone (SiO2 with Fe2O3 cement)

Dalmation Stone

Peralkaline Rock (SiO2 with Arfvedsonite)

Serpentine (Serpentinite)

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4