Mineral Within Sedimentary Rock

Orbicular Rhyolite (Rainforest Jasper)

Rhyolite containing Spherulites (SiO2 with impurities)

Red Chert

Microcrystalline Quartz (SiO2)

Chert (Flint Nodules)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Milky Quartz (Crystal Cluster)

Silicon Dioxide (SiO2) - Quartz Variety

Jasper

Silicon dioxide (SiO2) with iron impurities

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Conglomerate

Conglomerate (clastic sedimentary rock)

Barite Rose (Desert Rose)

Barium Sulfate (BaSO4)

Chert / Jasper

Microcrystalline Quartz (SiO2)

Chert (Nodular)

Microcrystalline Silica (SiO2)

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Turquoise

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

Chert / Flint Conglomerate

Silicified Sedimentary Breccia (primarily SiO2)

Greenstone / Diabase Porphyry

Porphyritic Diabase (Micro-gabbro)

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Chert (often called Flint)

Chert (Microcrystalline or cryptocrystalline Silica, SiO2)

Gneiss

Gneiss

Shale

Lutaceous sedimentary rock

Desert Rose (Gypsum Variety)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Chert (specifically a weathered Chert nodule or fragment)

Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)

Breccia

Breccia (Clastic Sedimentary Rock)

Druzy Quartz on Chert/Chalcedony

Silicon Dioxide (SiO2)

Ironstone Concretions (Ironstone)

Ferruginous Sandstone or Siltstone (Fe2O3)

Conglomerate

Conglomerate (clastic sedimentary rock)

Shale

Shale (fine-grained clastic sedimentary rock)

Limestone (specifically Grainstone or Micrite)

Calcium Carbonate (CaCO3)

Basalt Porphyry

Porphyritic Basalt

Diamond (in Matrix)

Carbon (C)

Ironstone Concretion (Moqui Marble)

Iron-oxide Concretion (Hydrated ferric oxide, Fe2O3·nH2O)

Chert (Holey Stone)

Microcrystalline Quartz (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Quartz in Host Rock

Silicon Dioxide (SiO2) in Rhyolite or Granite matrix

Coal

Bituminous or Anthracite coal (carbon-rich sedimentary rock)

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Chert (Yellow Jasper/Quartzite Pebble)

Microcrystalline Silicon Dioxide (SiO2)

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Quartz in Matrix (possibly Basalt or Siltstone host)

Silicon Dioxide (SiO2) in Host Rock

Gneiss (specifically Biotite Gneiss)

Gneiss (high-grade metamorphic rock primarily composed of Silicates)

Puddingstone

Conglomerate

Dark-colored Igneous Rock (likely Basalt or Diabase)

Basalt (extrusive igneous) or Diabase (intrusive igneous)

Turquoise

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

Gneiss

Gneiss (High-grade Metamorphic Rock)