Quartzite with Chlorite/Epidote
Metamorphosed Quartzite (SiO2)
metamorphic
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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Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
sedimentary
Agate Geode with Quartz Druzy
Chalcedony (SiO2) and Quartz (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Specular Hematite (Specularite) in Matrix
Specularite (Fe2O3)
mineral
Chert (Honey Chert / Flint)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Milky Quartz (Tumbled Pebble)
Silicon Dioxide (SiO2)
mineral
Magnetite (potentially Hematite-rich)
Magnetite (Fe3O4)
mineral
Chert (Jasper-rich River Cobble)
Cryptocrystalline Quartz (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with Iron traces)
mineral
Larimar (Pectolite)
NaCa2Si3O10(OH) (Sodium Calcium Silicate Hydroxide)
mineral
Agate (Geode nodule)
Cryptocrystalline Quartz (SiO2)
mineral
Granodiorite
Granodiorite
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)
Igneous
Chert (Iron-stained)
Chert (Silicon Dioxide, SiO2)
sedimentary
Conglomerate
Sedimentary Conglomerate with Basaltic Clast
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Sandstone (likely Ferruginous)
Sandstone (SiO2 with iron oxides)
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Orange Quartz / Quartzite
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
metamorphic
Basalt
Mafic Igneous Rock (composed primarily of pyroxene and calcium-rich plagioclase)
igneous
Mixed River Pebbles
Clastic Sedimentary Alluvial Deposit / Polymictic Conglomerate Clasts
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Rhodonite (in matrix)
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Mineral
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Clastic Sedimentary Rock (SiO2 with FeO/Fe2O3)
sedimentary
Banded Agate (with Quartz Geode Center)
Silicon Dioxide (SiO2)
mineral
River Cobble (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneissic/Schistose)
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Volcanic Rock)
igneous
Gray Chalcedony Gemstone
Chalcedony (SiO2)
mineral
Chert (Brecciated Chert)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Quartzose Pebble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2
Mineral