Green Aventurine
Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Category
Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)
Browse sedimentary rock (possibly a conglomerate or coarse grained sandstone) specimens identified by the Rock Identifier community.
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Basalt
Basalt (dominated by plagioclase feldspar and pyroxene)
igneous
Yellow Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary
Celestite (Celestine)
Strontium Sulfate (SrSO4)
mineral
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with Crocidolite or Magnesio-riebeckite inclusions
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Pink Quartzite
Quartzite (mainly SiO2 with iron oxide impurities)
metamorphic
Quartzite (with Iron Staining)
Quartzite (predominantly SiO2)
metamorphic
Black Opal
Amorphous Hydrated Silica (SiO2·nH2O)
mineral
Asphalt (Aggregate)
Bituminous macadam / Concrete Aggregate
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Aventurine (Green)
Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2
metamorphic
Chert / Flint
Chert (varietal name for microcrystalline quartz). Chemical formula: SiO₂
Mineral
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
sedimentary
Sulfur
Native Sulfur (S8)
mineral
Red Jasper (Microcrystalline Quartz)
SiO2 (Silicon Dioxide) with Iron Oxide inclusions
sedimentary
Petrified Wood
Silicified wood (primarily Silicon Dioxide - SiO2)
mineral (silicate-replaced organic material)
Quartzite
Quartzite (SiO2)
metamorphic
Quartz
Silicon Dioxide (SiO2)
Mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Jasper, Agate, Quartz Mix (Polished Beads)
SiO₂ (Silicon Dioxide) for Quartz. Jasper and Agate are cryptocrystalline varieties of Quartz.
Mineral/Semiprecious Gemstone (variety of Quartz)
Calcite
Calcite (Mineral; CaCO₃)
Mineral
Greenstone (possibly Basalt or Greenschist)
Greenschist (composed primarily of chlorite, actinolite, and epidote)
Metamorphic (low-grade)
Chert Pebble (Jasperoid/Flint)
Silicon Dioxide (SiO2) - cryptocrystalline quartz
Sedimentary
Opal
Hydrous silicon dioxide (SiO2·nH2O)
mineral
Granite or Pegmatite with Mica
Granitoid
igneous
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
sedimentary
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Chert (Arrowhead Preform or Point)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Red Jasper (possibly)
Jasper (a variety of Chalcedony, SiO2)
Mineral
Gneiss
Gneiss
metamorphic
Not a rock, mineral, or geological specimen
N/A
Calcite
Calcite (CaCO₃)
Mineral
Muscovite Mica
Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2
mineral
Gneiss
Gneiss
metamorphic
Garnet (likely Almandine)
Almandine Garnet, Fe3Al2(SiO4)3
mineral