Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
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Black Onyx
Chalcedony (SiO2)
gemstone
Black Onyx
Chalcedony (SiO2)
gemstone
United States Quarter Dollar
Cupronickel Clad Alloy (75% Copper, 25% Nickel over a 100% Copper core)
Metal / Man-made mineral-like object
Native Gold in Quartz Host
Hydrothermal Gold (Au) in Quartz (SiO2)
mineral
Black Onyx
Silicon Dioxide (SiO2) with layered chalcedony
mineral
Black Onyx
Chalcedony (SiO2)
gemstone
Porphyry
Porphyritic Andesite/Basalt
igneous
Geode (Unopened)
SiO2 (Quartz-filled Sedimentary Nodule)
sedimentary
Metaconglomerate
Protolith: Conglomerate (comprising SiO2, Al2O3, etc.)
metamorphic
Scoria (Lava Rock)
Scoria (Mafic volcanic rock)
igneous
Chert Breccia
Brecciated Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon dioxide with iron impurities (SiO2)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Porphyry
Porphyritic Igneous Rock
igneous
Quartzite River Stone
Quartzite (primarily SiO2)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Vesicular Basalt (Scoria)
Vesicular Basalt
igneous
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Travertine (Tufa)
Chemical Sedimentary Rock (CaCO3)
sedimentary
Quartz Geode
Quartz (Silicon Dioxide, SiO2) in a Geode
sedimentary
Geode with Quartz/Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Peridotite
Ultramafic igneous rock
igneous
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Angelite
Anhydrous Calcium Sulfate (CaSO4)
mineral
Quartzite Pebble
Meta-quartzite
metamorphic
Black Onyx
Chalcedony (SiO2)
gemstone
Onyx (Black Onyx)
Silicon Dioxide (SiO2)
mineral
Red Jasper or Ironstone concretion
SiO2 or Fe2O3
sedimentary or mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Agate
Cryptocrystalline quartz (SiO2)
mineral
Chondrite Meteorite
Ordinary Chondrite (L or H group)
igneous
Geode (Unopened)
Silica Concretion / Geode (Formula: SiO2 for quartz internal contents)
sedimentary
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Quartz Geode (partially filled/solid)
Silicon Dioxide (SiO2)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (S-type Asteroid fragment)
mineral
Quartz Geode
Clear Quartz (Silicon Dioxide, SiO2)
mineral
Diamond (in jewelry setting)
Carbon (C)
mineral
Quartzite
Quartzite (SiO2)
metamorphic