Mineral, Often Found As Detrital Grains In Sedimentary Rocks

Garnet (Almandine)

Almandine (Fe3Al2(SiO4)3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Orange Quartzite / Aventurine

Silicon Dioxide (SiO2)

Sodalite

Na8(Al6Si6O24)Cl2

Jasper

Jasper (a variety of Chalcedony, SiO2)

Quartz Geode

Silicon Dioxide (SiO₂)

Peridot

Olivine (Mg, Fe)2SiO4

Igneous, specifically volcanic/extrusive (possibly Rhyolite or Andesite)

Weathered Volcanic Rock (possibly Rhyolite or Andesite Pebble)

Volcanic rock (e.g., Rhyolite or Andesite, specific identification would require thin section analysis or chemical assay). Mineral composition: Primarily feldspars (orthoclase and/or plagioclase), quartz (in rhyolite), micas, amphiboles, and sometimes pyroxenes.

Conglomerate (Red Sandstone variety)

Clastic Sedimentary Rock (Conglomeratic Sandstone)

Turquoise (possible Dyed Howlite or Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (Turquoise)

Turquoise

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

Blue Chalcedony Geode (with Quartz Druzy)

Silicon Dioxide (SiO2) - Microcrystalline variety of Quartz

Amygdaloidal Basalt

Amygdaloidal Mafic Volcanic Rock

Porphyritic Basalt (with Augite Crystals)

Porphyritic Mafic Volcanic Rock (Fe-Mg Silicates)

Garnet

Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3

Turquoise

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

Jasper

Jasper (Silica-rich microcrystalline Quartz, SiO2 with Fe2O3 impurities)

Quartzite (River-worn Shiner)

Quartzite (Formula: SiO2)

Quartzite Pebble

Recrystallized Quartz (SiO2)

Pyrite

Iron Sulfide (FeS2)

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Native Gold Nuggets

Native Gold (Au)

Schist

Crystalline Schist (often containing Muscovite, Biotte, or Quartz)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Flint (Chert)

Cryptocrystalline Quartz (SiO2)

White Agate (Chalcedony)

Agate (Silicon Dioxide - SiO2)

Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Oolitic Limestone

Oolite (Sedimentary rock composed of CaCO3)

General Gravel (River Rock/River Stones)

Mixed Lithic Sediments (Conglomerate Clasts)

Satin Spar (Selenite)

Gypsum (CaSO4·2H2O)

River Cobble (likely Basalt)

Mafic Igneous Rock (Aphanitic)

Igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Pink Granite

Granite (Phaneritic intrusive rock rich in K-feldspar)

Conglomerate

Conglomerate (clastic sedimentary rock)

Pyrite

Iron Disulfide (FeS2)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Red Jasper (Tumbled)

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper

Jasper (a variety of Quartz, SiO2)

Quartzite

Quartzite (primarily SiO2)

Topaz

Topaz (Al2SiO4(F,OH)2)