Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Category
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
Tumbled Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Eudialyte in Matrix
Eudialyte [Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2]
Chert (Field Stone)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
Chert (Nodule)
Chert (SiO2)
Epidote in Granite Gneiss
Epidote bearing Orthogneiss (Ca2(Al,Fe)3(SiO4)3(OH))
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
Green Jasper
Silicon Dioxide (SiO2) with impurities
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
Chert (variously identified as Flint)
Microcrystalline Quartz (SiO2)
Flint
Chert (a form of cryptocrystalline quartz, chemical formula SiO₂)
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay inclusions
Lepidolite and Rubellite (Pink Tourmaline) in Quartz
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite) and Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (Elbaite/Pink Tourmaline)
Chert (variously identified as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
Chert (Smooth River Pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Tiger's Eye (dark/grey variant)
Pseudomorph of Quartz after Crocidolite (SiO2)
Tiger's Eye
Silicon Dioxide (SiO2)
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Amber
Succinite (C10H16O)
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Fulgurite
Fulgurite (Lechatelierite-rich variety)
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
Limonite with Iron Inclusions
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Chert / Flint Nodules in Limestone
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
Chert (Jasper focus)
Silicon dioxide (SiO2) - Microcrystalline Quartz
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Ferruginous Sandstone (Ironstone)
Sedimentary rock with Limonite/Goethite cement
Chert (specifically Flint or Novaculite variant)
Chert (Microcrystalline Quartz, SiO2)
Red Jasper
Microcrystalline Quartz (SiO2) with Hematite impurities
Travertine
Calcareous Tufa (CaCO3)
Dyed Dalmatian Jasper (Dalmatian Stone)
Perthitic Feldspar with Arfvedsonite inclusions
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Yellow Jasper variant)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Amber
Succinite (organic hydrocarbon)