Pyrite
Pyrite (Iron Disulfide), FeS2
Category
Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.
Pyrite
Pyrite (Iron Disulfide), FeS2
Clear Quartz
Crystalline Silicon Dioxide (SiO2)
Sand Dollar Fossil (Echinoidea)
Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Hag Stone (Piddock bored rock)
Calcareous sedimentary rock featuring Pholadidae borings
Quartz Pebble
Silicon Dioxide (SiO2)
Chert (specifically Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
Granitic Gneiss
Gneiss (High-grade Metamorphic Rock)
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Red Jasper
Jasper (Silicon Dioxide, SiO2)
Zebra Jasper
Silicon Dioxide (SiO2) with impurities; typically a form of Chalcedony/Microcrystalline Quartz
Chert (or Flint)
Silicon dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Rough Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Jasper Agate
Chalcedony (Silicon Dioxide - SiO2)
Quartz (Chert/Chalcedony Variety)
Silicon Dioxide (SiO2)
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
Chert (Nodular Chert)
Microcrystalline Silica (SiO2)
Granite
Granite (a common rock name, not a single mineral species, composed primarily of quartz, feldspar, and mica/amphibole)
Quartz
Quartz (Silicon Dioxide - SiO2)
Carnelian Agate
Carnelian (Silicon Dioxide - SiO2)
Quartz
Silicon Dioxide (SiO2)
Hematite (Iron Ore)
Hematite (Fe2O3)
Granite
Granite (Felsic intrusive igneous rock)
Bloodstone Jasper (Heliotrope)
SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz
Diamond (in Jewelry)
Carbon (C)
Ironstone (Limonitic Concretion)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions
Carnelian (a variety of Chalcedony)
SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz
Stromatolite
Biogenic Sedimentary Rock (Lithified microbial mat)
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Nodule)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
Fluorite
Calcium Fluoride (CaF2)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Red Jasper
Jasper (Silicon Dioxide with iron oxide inclusions), SiO2
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
White Quartz
Quartz (SiO2)
Diamond
Diamond (pure Carbon, C)