Mineral Within A Sedimentary Rock

Specular Hematite

Specularite (Fe2O3)

Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

Chert (Jasper/Limonitic Chert)

Microcrystalline Quartz (SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz (Milk Quartz / Massive Quartz)

Silicon Dioxide (SiO2)

Chert (Flint Nobule)

Silicon Dioxide (SiO2)

Que Sera Stone (Llanite)

Rhyolite containing blue quartz and feldspar

Agate

Chalcedony (cryptocrystalline variety of Quartz, SiO2)

Carnelian (Red Chalcedony)

Silicon Dioxide (SiO2) - variety of Chalcedony

Clear Quartz Cluster

Quartz (Silicon Dioxide - SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Yellow Chalcedony

Silicon Dioxide (SiO2)

Pumice

Pumicite (Amorphous glass with varying chemical composition, often rhyolitic)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Chert Pebble (Jasper/Quartz variety)

Microcrystalline Quartz (SiO2)

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Conglomerate (River Rock)

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (Grooved/Weathered)

Arenite (composed primarily of Quartz and Lithic fragments)

Ferruginous Quartz

Silicon Dioxide with Hematite/Limonite inclusions (SiO2 + Fe2O3)

Marble

Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)

Rutilated Quartz

Quartz with Rutile Inclusions (SiO2 with TiO2 inclusions)

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Hag Stone

Porous sedimentary rock (typically Flint, Chert, or Sandstone) with naturally occurring holes

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Petrified Wood

Silicified Wood (SiO2)

Chert (Flint variety)

Chert (SiO2)

Raw Emerald in Schist Matrix

Beryl (Be3Al2Si6O18) in Mica Schist

Gneiss

Gneiss (High-grade Metamorphic Rock)

Fossiliferous Shale (with Vertebrate Bones)

Laminated Mudstone containing Fossilized Bone (Apatite)

Schist

Mica Schist (Variable chemistry, often rich in muscovite and biotite)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (SiO2 primary composition)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Sandstone

Arenite (composed primarily of SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Howlite

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Iron-stained Quartzite / Chert

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Blue Agate (Dyed)

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)