Petrified Wood
Silicified Wood (SiO2)
sedimentary
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or limonite inclusions
sedimentary
Shungite
Non-crystalline carbon (Fullerenes / Carbon-60)
metamorphic
Pumice
Pumice (a highly vesicular volcanic glass)
igneous
Gneiss (Augen Gneiss)
Augen Gneiss
metamorphic
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Banded Onyx (Mexican Onyx / Travertine)
Calcite (CaCO3) - Banded Travertine
sedimentary
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Quartzite
SiO2 (Crystalline Quartz)
metamorphic
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
sedimentary
Tumbled Stone Collection (Fluorite, Sodalite, Moss Agate, Amethyst/Charoite, and Grey Agate)
Silica (SiO2) and Calcium Fluoride (CaF2) based minerals
mineral
Caribbean Calcite
Calcium Carbonate (CaCO3) with Aragonite (CaCO3)
sedimentary
Sandstone with Quartz Vein
Arenite with Quartz (SiO2) Infilling
sedimentary
Bauxite
Al2O3·2H2O (principally composed of gibbsite, boehmite, and diaspore)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (Common Agate)
Silicon Dioxide (SiO₂)
mineral
Quartz on Host Rock
Silicon Dioxide (SiO2)
Mineral Specimen
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Slate
Slate (Metamorphosed Siltstone/Mudstone)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron inclusions
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Specular Hematite (on Schist/Matrix)
Hematite (Alpha-Fe2O3)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Quartz Vein in River Siltstone
Crystalline Quartz (SiO2) in Siliclastic Matrix
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral