Vesicular Basalt (or Scoria)
Extrusive Igneous Rock (Mafic)
igneous
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
Learn about Amorphous Solid in the encyclopedia
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River Pebble
Quartzite / Weathered Sedimentary Rock
sedimentary
Black Onyx
Silicon Dioxide (SiO2)
mineral
Chondrite Meteorite
L or H Ordinary Chondrite
meteorite
Fossil Coral (Rugose Coral / Horn Coral fragment)
Rugosa (Tetracoralla) / Calcite (CaCO3)
fossil
Black Onyx
Cryptocrystalline Quartz (SiO2)
mineral
Black Onyx
Chalcedony (Silicon Dioxide, SiO2)
gemstone
Wishing Stone (Veined Pebble)
Quartz-veined Metasedimentary Pebble
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Porphyry
Porphyritic Rhyolite/Andesite
igneous
Quartz Geode
Silicon Dioxide (SiO2) in Geode form
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Rutilated Quartz
Rutile in Quartz (SiO2 with TiO2 inclusions)
mineral
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
sedimentary (artificial)
Geode (unopened nodule)
Silicon Dioxide (SiO2) Nodule
sedimentary
Blue Quartz (Dumortierite Quartz)
Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)
metamorphic
Quartz with inclusions (likely Chlorite or Hornblende) and country rock
SiO2 (Quartz) with associated ferromagnesian minerals
Mineral/Igneous/Metamorphic association
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Grey Basalt or Andesite with Veining
Intermediate to Mafic Extrusive Igneous Rock with Quartz/Calcite Veins
igneous
Dead Sea Salt Crust
Halite (NaCl)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Chondrite Meteorite
Ordinary Chondrite (L or H group)
igneous
Geode (Unopened)
Silica Concretion / Geode (Formula: SiO2 for quartz internal contents)
sedimentary
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
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with artificial dye
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Black Onyx
Silicon Dioxide (SiO2) with layered chalcedony
mineral
Native Gold in Quartz Host
Hydrothermal Gold (Au) in Quartz (SiO2)
mineral
Black Onyx
Chalcedony (SiO2)
gemstone
Black Onyx
Silicon Dioxide (SiO2) - Chalcedony
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