Conglomerate
Clastic sedimentary rock (Conglomerate)
sedimentary
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
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Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Porphyry
Porphyritic Igneous Rock
igneous
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Vesicular Basalt (Scoria)
Basalt with vesicular texture
igneous
Leopard Skin Jasper
Orbicular Rhyolite (Silicon Dioxide with various impurities)
sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron inclusions
sedimentary
Scoria (Lava Rock)
Vesicular Basalt / Scoria
igneous
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Man-made metamorphic-style composite
Quartzite (with Metamorphic Foliation)
Quartzite (Recrystallized SiO2)
metamorphic
Basalt Scoria
Vesicular Basalt
igneous
Red Scoria
Scoria (Vesicular Basalt/Andesite)
igneous
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2)
sedimentary
Black Onyx (Tumbled)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Pink Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
sedimentary
Quartz Geode or Vuggy Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Geode (Cracked)
Quartz (Silicon Dioxide, SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Gold Ore (Lode Gold)
Native Gold (Au) in Matrix
mineral
Black Onyx
Chalcedony (SiO2 with inclusions)
mineral
Gold
Gold (Native Au)
mineral
Black Onyx
Silicon dioxide / Chalcedony (SiO2)
mineral
Quartz Geode (Unbroken)
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in a concretion
sedimentary
Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
mineral
Porphyritic Andesite
Andesite (Porphyritic texture)
igneous
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Quartz-Veined Gneiss or Metamorphic Rock with Quartz Veins
Quartz-veined metamorphic rock (Silicate mineral assemblage)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
Mineral/Sedimentary
Sulfur (with possible Cullet Glass or Slag imitation)
Native Sulfur (S8)
mineral
Gold
Native Gold (Au)
mineral
Gold
Native Gold (Au)
mineral
Orbicular Jasper (Ocean Jasper variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Diorite with Quartz Veins
Diorite
igneous
Quartzite
Quartzite (primarily SiO2)
metamorphic
Feldspar-rich Quartzite
Meta-arkose (Quartz-Feldspar Quartzite)
metamorphic
Chert with Asphaltum (or Tar)
Silica (SiO2) with natural Bitumen/Asphaltum
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Black Onyx
Silicon Dioxide (SiO2) - Chalcedony variant
mineral
Belemnite Fossil
Belemnitella sp. (rostrum)
fossil
Black Onyx
Silicon Dioxide (SiO2) with parallel banding
mineral