Puddingstone
Conglomerate (Indurated)
sedimentary
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
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Vesicular Basalt (Scoria)
Vesicular Basalt
igneous
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Porphyritic Andesite
Porphyritic intermediate volcanic rock (Andesite)
Igneous
Agate Geode
Silicon Dioxide (SiO2)
sedimentary
Banded Black Agate
Silicon Dioxide (SiO2)
mineral
Conglomerate (Pebble Conglomerate)
Conglomerate
sedimentary
Native Gold
Native Gold (Au)
mineral
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Chondrite Meteorite
L or H Ordinary Chondrite
igneous
Blue Grey Agate Geode
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Black Onyx
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Black Onyx
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (mostly SiO2)
metamorphic
Black Onyx
Chalcedony (Silicon Dioxide, SiO2)
mineral
Black Onyx
Silicon Dioxide (SiO2)
mineral
Thunder Egg (Agate/Jasper filled)
Chalcedony variety Agate/Jasper in a Rhyolitic matrix
sedimentary
Geode Nodules / Chert Pebble
Silicon Dioxide (SiO2) / Quartz concretion
sedimentary
Geode (Chert/Quartz)
Silicon Dioxide (SiO2)
sedimentary
Gray Basalt Cobble
Basalt
igneous
Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
Igneous/Sedimentary/Metamorphic with Mineral Vein
Granite (Core Sample)
Phaneritic Felsic Igneous Rock (Granite)
igneous
Red Jasper
SiO2 (Microcrystalline Quartz)
Mineral
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
sedimentary
Porphyritic Andesite
Andesite (Porphyry)
igneous
Quartz Geode (partially opened)
Silicon Dioxide (SiO2) with iron staining
mineral
Black Onyx
Chalcedony (SiO2)
gemstone
Red Scoria
Scoria (vesicular basaltic rock)
igneous
Black Onyx
Onyx (Silicon Dioxide, SiO2)
mineral
Black Onyx
Silicon Dioxide (SiO2) with parallel banding
mineral
Gold
Native Gold (Au)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Fancy Jasper
Chalcedony (SiO2)
sedimentary
Chalcedony (River Agate)
Silicon Dioxide (SiO2)
mineral
Geode Nodules / Agate Chert
Silicon Dioxide (SiO2)
sedimentary
Geode or Concretion
Silica-rich Concretion or Unopened Geode (SiO2)
sedimentary
Native Gold Nugget
Native Gold (Au)
mineral
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Agate Geode (Unopened)
Cryptocrystalline Quartz (SiO2) with Chalcedony
mineral