Mineral, Often Found As Detrital Grains In Sedimentary Rocks

Red Quartzite

Quartzite (primarily SiO2)

Botryoidal Chalcedony (likely Desert Rose/Agatized Geode Crust)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Greenstone / Greenstone Pebble

Greenschist (metamorphosed basalt or gabbro)

Red Jasper (Siltstone or Chert-based Jasper)

Silicon dioxide with hematite (SiO2 + Fe2O3)

Fluorite

Calcium Fluoride (CaF2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite (Tumbled Pebble)

Metamorphosed Quartz Sandstone (SiO2)

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite impurities

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Desert Rose

Gypsum (variety Selenite) or Barite, CaSO4·2H2O

Greywacke (River Slikkenstone)

Greywacke (Impure Sandstone)

Quartzite (River Pebble)

Metamorphosed Quartz Sandstone (primarily SiO2)

Carnelian Agate

Chalcedony (SiO2) with iron oxide inclusions

Agate Nodule / Weathered Chert

SiO2 (Silicon Dioxide - Microcrystalline Quartz)

Conglomerate

Conglomerate (Clastic sedimentary rock)

Red Quartzite

Quartzite (SiO2)

Chert / Flint Nodules

Cryptocrystalline Quartz (SiO2)

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Quartz

Quartz (Silicon Dioxide - SiO2)

Quartzite

Quartzite (SiO2)

Jasper Agate

Chalcedony (Silicon Dioxide - SiO2)

Chert / Jasper

Silicon Dioxide (SiO2)

Gneiss

Gneiss (high-grade metamorphic rock)

Marble

Marble (metamorphosed limestone or dolostone), primarily composed of calcite (CaCO3) or dolomite (CaMg(CO3)2)

Quartzite

Quartzite (primarily SiO2)

Quartzite with Iron Inclusions

Quartzite (primarily SiO2)

Red Jasper

Silicon Dioxide (SiO2)

Pebble (likely Quartz or Chert)

SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.

Green Quartzite

Quartzite (SiO2 with chromium-rich muscovite/fuchsite inclusions)

Turquoise

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

Quartzite Pebble

Quartzite (primarily SiO2)

Greywacke (River Pebble with Quartz Veins)

Greywacke (Indurated Sandstone); Veins: SiO2 (Quartz)

Quartzite

Quartzite (SiO2)

Greywacke (River Slikenside)

Greywacke (Lithic Sandstone)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2 + Fe2O3

Agate (Dyed High-Grade Polished Slice)

Silicon dioxide (SiO2), Chalcedony crystal variety

Pink Rhodonite

Manganese Silicate (MnSiO3)

Pyrite in Shale

Iron Disulfide (FeS2) in Sedimentary Shale

Conglomerate

Clastic Sedimentary Rock (Conglomerate)

Dinosaur Fossil (Skull)

Dinosauria fossilis (Petrified Hydroxyapatite / Calcium Carbonate)

Olivine-bearing Basalt / Scoria

Mafic Igneous Rock (primarily (Mg, Fe)2SiO4)