Chert (Chert Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Category
Man Made Glass
Browse man made glass specimens identified by the Rock Identifier community.
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Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Blue Quartz (or Blue Aventurine)
Silicon Dioxide (SiO2) with inclusions (typically Crocidolite or Dumortierite)
mineral
Lake Superior Agate
Silicon Dioxide (Cryptocrystalline Quartz), SiO2
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Chert
Chert (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Pumice
Pumicite
igneous
Yellow Quartzite River Stone
Quartzite (SiO2)
metamorphic
Quartzite river stone
Quartzite (SiO2 silicon dioxide)
metamorphic
Sandstone Pebbles
Arenite
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with iron oxide Fe2O3 staining)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (with Limonite/Iron Staining)
Arenite (SiO2 based) with FeO(OH) staining
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 with minor iron oxides)
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite River Rock
Metamorphic Rock (Recrystallized Quartz - SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (with Laminations)
Clastic sedimentary rock (primarily Quartz-based)
sedimentary
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Limestone
Calcitic Limestone (CaCO3)
sedimentary
Sandstone (Weathered)
Arenite (typically SiO2 as quartz grains)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Micaceous)
Clastic Sedimentary Rock - Micaceous Litharenite (SiO2 principal)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Red Sandstone
Arenite (SiO2 with Fe2O3)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary