Quartzite
Metamorphosed Quartz Sandstone (primarily SiO2)
metamorphic
Category
Mineral, Often Found As Detrital Grains In Sedimentary Rocks
Browse mineral, often found as detrital grains in sedimentary rocks specimens identified by the Rock Identifier community.
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Rough Quartz (with potential Host Rock)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine or Yellow Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Chert (Jasper variation)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins)
Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)
igneous or sedimentary
Fossiliferous Brachiopod in Shale
Brachiopoda (Phylum) preserved in Carbonaceous Shale
sedimentary
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Micaceous Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Graywacke (Sandstone)
Graywacke Sandstone
sedimentary
Mica Schist
Mica Schist (predominantly composed of Muscovite or Biotite silicates)
metamorphic
Quartz (Quartzite Pebble)
Silicon Dioxide (SiO2)
metamorphic
Muscovite Schist
Muscovite (KAl2(AlSi3O10)(OH)2) in Schist
metamorphic
Schist
Mica Schist
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Conglomerate
Clastic sedimentary rock (Puddingstone)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Garnet Schist
Almandine Garnet Schist
metamorphic
Garnet (likely Pyrope or Almandine)
Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.
Mineral
Piddock bored rock (Boring Stone)
Ichnofossil-bearing Limestone or Mudstone (trace fossils by Pholadidae)
sedimentary
Granite
Granite (a felsic intrusive igneous rock)
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint when in chalk or limestone)
Silicon Dioxide (SiO₂)
sedimentary
Quartzite
Quartzite (primarily SiO2)
Metamorphic
Chert (River Pebble)
Microcrystalline quartz (SiO2)
sedimentary
River Rocks (Basalt and Sedimentary Stones)
Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock
igneous and sedimentary
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartz Druze on Matrix (Geode Fragment)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky or Rough Quartz)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Smoky Quartz or Agate nodule fragment)
Silicon Dioxide (SiO2)
mineral
Orbicular Granite (specifically Mustard or Yellow Tonalite/Granodiorite)
Orbicular Quartz Diorite / Tonalite
igneous
Coarse-grained Granite (Quartz and Feldspar dominated)
Granitoid (KAlSi3O8 – NaAlSi3O3 – CaAl2Si2O8 – SiO2)
Igneous