Quartz (Smoky/Milky variety with inclusion)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Conglomerate
Clastic sedimentary rock (Conglomerate)
sedimentary
Sandstone (Graywacke type)
Clastic Sedimentary Rock (Lithic Sandstone)
sedimentary
Granitic Quartz with Feldspar
Granite (composed primarily of SiO2 and KAlSi3O8)
igneous
Chakra Stone Tower (Composite Multi-Mineral)
Crystalline Silicon Dioxide composite (SiO2) with various inclusions
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Dalmatian Stone (often misnamed Dalmatian Jasper)
Aplite (with hornblende/arfvedsonite inclusions)
igneous
Brown Jasper
Jasper (a cryptocrystalline variety of Quartz, SiO2)
Mineral, specifically a variety of Quartz
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Moqui Marble (Concretion)
Iron Oxide Concretion (Hematite-cemented Sandstone)
sedimentary
Serpentinite
Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)
metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Chalcedony Geode Fragment
Microcrystalline Quartz (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Goethite (Iron Ore)
Goethite (FeO(OH))
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Chert (specifically Yellow/Brown Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Granite
Granite (a plutonic rock)
Igneous
Quartz Vein in River Siltstone
Crystalline Quartz (SiO2) in Siliclastic Matrix
sedimentary
Basalt (River Pebble)
Basalt
igneous
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Carnelian
Carnelian (a variety of Chalcedony, SiO₂)
Mineral
Sandstone (likely Ferruginous)
Sandstone (SiO2 with iron oxides)
sedimentary
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Chert Nodule
Microcrystalline Silica (SiO2)
sedimentary
Fluorite (often referred to as Rainbow Fluorite)
Fluorite (Calcium Fluoride, CaF2)
mineral
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)
metamorphic
Conglomerate
Conglomerate (Sedimentary Clastic Rock)
sedimentary
Gneiss (with Quartzite and Biotite)
Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)
metamorphic
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
Mineral
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
Igneous
Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Garnet Schist or Garnet-bearing Quartzite
Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)
metamorphic
Ventifact
Eolian Ventifact (often composed of basalt, chert, or quartzite)
sedimentary
Granite
Granite (Phaneritic igneous rock)
igneous
Sunstone
Oligoclase (Plagioclase Feldspar) - (Na,Ca)(Si,Al)4O8 with Hematite or Copper inclusions
mineral