Blue Chalcedony
Silicon Dioxide (SiO2)
Category
Browse sedimentary (artificial) specimens identified by the Rock Identifier community.
Blue Chalcedony
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Garnet in Schist (Polished Tower)
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
Muscovite Schist with Quartz
Mica Schist (KAl2(AlSi3O10)(OH)2)
Green Calcite
Calcite (Calcium Carbonate, CaCO3)
Rhodonite (in matrix)
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Quartz
Silicon Dioxide (SiO2)
Carnelian
Carnelian (Silicon Dioxide - SiO2)
Geode (Unopened)
Siliceous Concretion / Geode
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
Pyrite
Iron Sulfide (FeS2)
Orange Calcite
Calcium Carbonate (CaCO3)
Grey Chalcedony (Agate)
Silicon Dioxide (SiO2)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
Gypsum Wallboard (Drywall)
Hydrous calcium sulfate (CaSO4·2H2O)
Quartz
Silicon Dioxide (SiO2)
Blue Kyanite
Kyanite (Al2SiO5)
Gneiss
Gneiss
Milky Quartz
Silicon Dioxide (SiO2)
Amber
Succiniferous fossil resin (C10H16O)
Pyrite
Iron Sulfide (FeS2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Cinnabar
Mercury(II) sulfide (HgS)
Orange Calcite
Calcium Carbonate (CaCO3)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Jasper (Green/Dragon Blood variety)
Silicon Dioxide (SiO2) with iron/clay inclusions
Banded Calcite (often sold as 'Ocean Jasper' or 'Caribbean Calcite' variant)
Calcium Carbonate (CaCO3) with potential Aragonite inclusions
Jasper or Chalcedony
Microcrystalline Quartz (SiO2)
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
Galena
Lead(II) Sulfide (PbS)
Chert (specifically Flint or Common Opal)
Silicon Dioxide (SiO2)
Red Jasper (possibly Red Coral or dyed Howlite)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Botryoidal Hematite (included in Quartz/Limonite matrix)
Fe2O3 (Hematite) on Quartz (SiO2) / Limonite
Chert (or Flint)
Chert (microcrystalline or cryptocrystalline quartz, SiO2)
Jasper
Silicon dioxide (SiO2)