Quartz-veined Siltstone
Siltstone with Quartz (SiO2) veins
sedimentary
Category
Synthetic (Not A Rock Or Mineral)
Browse synthetic (not a rock or mineral) specimens identified by the Rock Identifier community.
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Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
sedimentary
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Fossil Snail
Gastropoda (fossilized)
fossil
Sandstone with Manganese Dendrites/Oxide coatings
Arenite with Pyrolusite and Romanechite (MnO2)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Ferruginous Sandstone
sedimentary
Granite
Granite
Igneous
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Granite
Intrusive igneous rock
igneous
Banded gneiss
Gneiss; typically quartz–feldspar–mica assemblage
metamorphic
Conglomerate
Conglomerate (Sedimentary Rock)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Diorite
Intermediate plutonic igneous rock
igneous
Sandstone with Liesegang Rings
Arenite with Iron Oxide Concretions
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
mineral
River Pebble (Likely Chert or Fine-Grained Sandstone/Quartzite)
Siliciclastic clast (likely Chert or Quartzarenite/Quartzite pebble)
Sedimentary
Chalcedony / Agate Pebble
Silicon Dioxide (SiO2)
mineral
Granite
Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)
igneous
Brecciated Jasper
Silicon dioxide (SiO2) microcrystalline quartz breccia
sedimentary
Triceratops Fossil
Triceratops horridus
fossil
Quartz (Moss-covered)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Sedimentary Rock (Quartz arenite/Arkosic sandstone)
sedimentary
Tiger's Eye (Brown/Dark variety)
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
metamorphic
Limestone with Quartz/Calcite Veins
Sedimentary Limestone (CaCO3 with SiO2 or CaCO3 intrusions)
sedimentary
Granite
Plutonic Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
K-Feldspar Granite Fragment
Granite (Alkali Feldspar-rich)
igneous
Limonite (after Pyrite Pseudomorph)
Limonite (Hydrated Iron Oxide Mixture, FeO(OH)·nH2O)
mineral
Sandstone
Sedimentary Clastic Rock (Quartz-rich)
sedimentary
Sandstone
Sandstone (Quartzose/Feldspathic Sandstone)
sedimentary
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
sedimentary
Quartz Sandstone Pebble
Sandstone (SiO2 dominated)
sedimentary