Chert (Chalcedony/Common Opal)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Synthetic)
Browse sedimentary (synthetic) specimens identified by the Rock Identifier community.
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Agate
Silicon dioxide (SiO2)
mineral
Chert / Flint Pebble
Cryptocrystalline Quartz (SiO2)
sedimentary
Chalcedony
Chalcedony (SiO2)
mineral
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Chalcedony (Common Opal variant)
Silicon dioxide (SiO2) with varying levels of hydration
mineral
Caribbean Calcite
Calcite (CaCO3) with Aragonite (CaCO3)
mineral
Quartz (Pale Rose or Milky Variety)
Silicon Dioxide (SiO2)
mineral
Graphite
Graphite (C)
mineral
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Iceland Spar (Optical Calcite)
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
White Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Aragonite (Flos Ferri)
Calcium Carbonate (CaCO3)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Chert (or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Chert (Flint)
Microcrystalline silica (SiO2)
sedimentary
Kyanite (Blue or Blue-Grey)
Kyanite (Al2SiO5)
metamorphic mineral
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Limonite (Ironstone)
Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Agate Nodule / Weathered Chert
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Sedimentary / Mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Variant)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Limonite (Ochreous)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Yellow Ochre / Limonite
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Optical Calcite (Iceland Spar)
Calcium Carbonate (CaCO3)
mineral
Jasper
Cryptocrystalline quartz (SiO2)
Sedimentary/Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral