Chert Breccia
Brecciated Microcrystalline Quartz (SiO2)
sedimentary
Category
Amorphous Solid
Browse amorphous solid specimens identified by the Rock Identifier community.
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Red Jasper
Silicon dioxide with iron impurities (SiO2)
sedimentary
Peridotite
Ultramafic igneous rock
igneous
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Angelite
Anhydrous Calcium Sulfate (CaSO4)
mineral
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (mostly SiO2)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Orbicular Jasper (Ocean Jasper)
Silicon Dioxide (SiO2) with various inclusions
mineral
Geode (unopened)
SiO2 - Chert-shelled concretion (mostly Quartz)
sedimentary
Quartz Geode (with possible Manganese or Goethite coating)
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (or Scoria)
Vesicular Basalt
igneous
Red Jasper or Ironstone concretion
SiO2 or Fe2O3
sedimentary or mineral
Chondrite Meteorite
Stony Meteorite (Ordinary Chondrite)
meteorite
Chondrite Meteorite
Stony Meteorite (Ordinary Chondrite)
meteorite
Plagioclase Feldspar
Plagioclase (NaAlSi3O8 - CaAl2Si2O8)
mineral
Geode (Unbroken)
Silicon Dioxide (SiO2) usually as Microcrystalline Quartz or Chalcedony
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chondrite Meteorite
Ordinary Chondrite (L or H Type)
igneous
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chondrite Meteorite
Ordinary Chondrite (L or H Type)
Mineral
Sunstone
Orthoclase or Oligoclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Vesicular Basalt (Iron-rich)
Scoriaceous Basalt / Oxidized Vesicular Basalt
igneous
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
Petrified Wood
Silicified wood (primarily quartz, SiO2)
sedimentary
Chondrite Meteorite
Undifferentiated Chondrite
meteorite
Diamond (Colorless/White)
Carbon (C)
mineral
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Scoria (Red Lava Rock)
Scoria (Mafic volcanic rock)
igneous
Black Onyx
Chalcedony (SiO2)
gemstone
Puddingstone
Conglomerate
sedimentary
Quartzite with Chlorite
Metamorphic Quartzite (SiO2) with phyllosilicates
metamorphic
Crazy Lace Agate
Chalcedony (Silicon dioxide, SiO2)
Mineral
Quartz Geode
Crystalline Quartz (SiO2) within a sedimentary or volcanic host
mineral
Graphic Granite
Pegmatitic Quartz-Feldspar Granite
igneous
Vesicular Basalt (Scoria)
Vesicular Basalt
igneous