Quartz
Silicon Dioxide (SiO₂)
Mineral
Category
Sedimentary (Secondary Classification For A Weathered Mineral Specimen)
Browse sedimentary (secondary classification for a weathered mineral specimen) specimens identified by the Rock Identifier community.
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Quartz (Milky/Clear Fragment)
Silicon Dioxide (SiO2)
mineral
Jasper (Iron-stained Chalcedony)
SiO2 with Fe2O3 (Iron Oxide) impurities
Sedimentary / Mineral (Silica)
Riverstone Quartzite
Quartzite (primarily SiO2)
metamorphic
Jasper / Yellow Chalcedony Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
sedimentary
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (primarily SiO2)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities
sedimentary
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Sandstone Concretion
Ferruginous Sandstone Concretion (SiO2 + FeO(OH))
sedimentary
Sandstone (likely Greywacke or Siltstone variety)
Arenite / Siltstone (primarily SiO2)
sedimentary
Ironstone Concretion (Moqui Marble type)
Iron oxide concretion (Goethite/Hematite and Sandstone)
sedimentary
Dendritic Agate or Manganese Nodule in Chert/Limestone
Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions
sedimentary
Amygdaloidal Basalt
Basalt with Secondary Mineral Infillings
igneous
Chert (Nodule)
Chert (Silicon dioxide, SiO2)
sedimentary
Granite Glacial Erratic
Phaneritic Plutonic Felsic Rock (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 – SiO2)
igneous
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with iron oxide cement Fe2O3)
sedimentary
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
mineral
Sandstone (Stream-rounded)
Arenite (SiO2 based)
sedimentary
Granite Gneiss River Rock
Gneiss
Metamorphic
Chert Pebble with Quartz Veins
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (with Quartz Veining)
Microcrystalline Quartz (SiO2)
sedimentary
Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)
Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)
mineral
Banded Agate (specifically Lake Superior Agate or similar)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Oolitic Limestone / Fossiliferous Chert
Oolitic Limestone (CaCO3) / Silicified Limestone
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Limonite/Goethite)
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica, SiO2)
sedimentary
Quartzite (River Cobble)
Quartzite (predominantly SiO2)
metamorphic
![Malachite (Copper carbonate hydroxide [Cu2CO3(OH)2]) — mineral](https://media.rockidentification.com/0ed01f12-e4f8-44fd-a6ac-1d448f78511f-thumbnail.jpg)
Malachite
Copper carbonate hydroxide [Cu2CO3(OH)2]
mineral
Quartz (Peach/Orange variety)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Sandstone (Red Sandstone)
Arenite with Hematite/Limonite cement
sedimentary
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Jasper
Silicon dioxide, SiO2
Mineral
Weathered Gabbro or Diorite (Igneous Cobble)
Phaneritic Basic/Intermediate Igneous Rock
igneous
Glauconite (Greensand Articulated Sandstone)
Glauconite ((K, Na)(Fe, Al, Mg)2(Si, Al)4O10(OH)2)
sedimentary
Limonite Concretion
Limonite (FeO(OH)·nH2O)
sedimentary
Leopard Skin Jasper
Silicified Rhyolite or Orbicular Jasper (SiO2)
sedimentary