Specular Hematite with Pyrite
Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)
Category
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Specular Hematite with Pyrite
Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)
Celestite (Celectine)
Strontium sulfate (SrSO4)
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
Honey Calcite
Calcium Carbonate (CaCO3)
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
White Agate (Chalcedony)
Chalcedony (SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Petrified Wood
Silicified Wood (primarily SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Tufa (Vesicular Limestone)
Tufa (form of Calcium Carbonate, CaCO3)
Gossan (Iron Hat)
Limonitic Gossan (Fe2O3·nH2O)
Quartz Vein in Host Rock (clastic sediment)
Silicon Dioxide (SiO2) in matrix
Desert Varnish on Sandstone
Ferromanganese coating on Quartz Arenite
Petrified Wood
Silicified Wood (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz with Limonite inclusions
Petrified Wood
Silicified Wood (SiO2)
Jasper (specifically Red Jasper/Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
Jasper (Red Jasper)
Jasper (SiO2 - Silicon Dioxide with iron inclusions)
Jasper
Jasper (Silicon Dioxide, SiO2 with iron inclusions)
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
Ferruginous Sandstone
Clastic sedimentary rock (primarily Quartz with Iron Oxide cement)
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
Septarian Nodule
Septarian Concretion (Composition: Calcite, Aragonite, and Limestone/Clay)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Jasper (specifically Fancy or Polychrome Jasper)
Silicon Dioxide (SiO2) - Chalcedony
Fossilized Echinoid (Sea Urchin)
Echinoidea (Fossil)
Petrified Wood
Silicified Wood (SiO2)
Pumice
Pumice (a highly vesicular volcanic rock)
Gneiss
High-grade Metamorphic Gneiss
Orange Calcite
Calcite (Calcium Carbonate - CaCO3)
Biotite Schist
Biotite Mica Schist [K(Mg,Fe)3AlSi3O10(OH,F)2]
Petrified Wood
Silicified wood (principally SiO2)
Fossil Shark Tooth
Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna
Garnet Schist
Garnetiferous Mica Schist
Gneiss (specifically a Hornblende Gneiss or Micaceous Gneiss)
Gneiss (metamorphic rock composed primarily of quartz, feldspar, and mafic minerals)
Quartz
Silicon Dioxide (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Green Calcite
Calcite (Calcium Carbonate, CaCO3)
Jasper (specifically Polychrome or Desert Jasper)
Silicon Dioxide with impurities (SiO2)
Jasper
Jasper (Silicon Dioxide, SiO2)
Bauxite (Pisolitic Bauxite)
Bauxite (mixture of Hydrous Aluminum Oxides)