Tree Agate
Silicon Dioxide (SiO2) - Dendritic Agate/Chalcedony
sedimentary
Category
Mineral Or Sedimentary Rock (With Mineral Inclusions)
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
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Red Jasper (Chert)
Silicon Dioxide (SiO2) with iron inclusions
sedimentary
Sandstone (likely Quartzose Sandstone with mineral staining)
Arenite (composed mainly of SiO2)
sedimentary
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
metamorphic
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt containing Zeolite and Calcite inclusions
igneous
River Cobble (Quartzite or Gneiss)
Metamorphic crystalline rock (predominantly SiO2 based)
metamorphic
Sandstone (Red Sandstone)
Arenite (predominantly SiO2 with Fe2O3 cement)
sedimentary
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone (River Rock)
Arenite (SiO2 principal component)
sedimentary
Amber-bearing Coal/Sedimentary Rock
Bituminous coal or carbonaceous siltstone with Fossilized Tree Resin (C10H16O)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 impurities)
sedimentary
Sandstone
Arenite (Sedimentary rock comprising sand-sized grains)
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
sedimentary
Zebra Jasper (with Chlorite/Epidote)
Silicon Dioxide (SiO2) with inclusions
sedimentary
Gneiss
Gneissic Metamorphic Rock (Mineral composition: Quartz, Feldspar, Amphibole/Biotite)
metamorphic
Red Sandstone (Hematitic)
Clastic sedimentary rock (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone (River Stone)
Arenite (primarily SiO2)
sedimentary
Yellow Jasper / Chalcedony
Silicon Dioxide (SiO2) with iron inclusions
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Fossiliferous Sandstone / Quartzite Pebble
Sedimentary rock with skeletal fragments (e.g., Paleozoic crinoid/brachiopod fossils)
fossil
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock, predominantly SiO2)
sedimentary
Chert on Volcanic Host Rock
Sedimentary Chert (SiO2) within Basalt or Andesite
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Red Jasper
Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
mineral
Garnet-Mica Schist
Garnetiferous Porphyroblastic Schist
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Ferruginous Sandstone
Ferruginous Quartz-Arenite
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite inclusions
sedimentary
Dalmatian Stone
Peralkaline rhyolite with arfvedsonite inclusions
igneous
Iron-stained quartz (likely quartzite or quartz-rich rock)
Quartz, silicon dioxide (SiO₂), with iron-oxide staining
mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Moss Agate Sphere
Silicon Dioxide (SiO2) with inclusions
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral