Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Chemically Precipitated) Or Metamorphic
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
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Quartz Vein in Matrix (Gneiss/Schist)
Silicon Dioxide (SiO2) in Metamorphic Rock Matrix
metamorphic
Biotite Schist (with Garnet and Pyrite)
K(Mg,Fe)3AlSi3O10(OH,F)2 (Biotite focus)
metamorphic
Flint/Chert Nodule in Limestone
Sedimentary rock containing microcrystalline quartz (SiO2) within a calcium carbonate (CaCO3) matrix
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, or Chrysotile)
metamorphic
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite Pebble (River Rock)
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartz (Quartzite or Quartz Pebble)
Silicon Dioxide (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcite (CaCO3)
Mineral
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Jasper (likely Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary (chemically precipitated mineral)
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Green Tiger's Eye
Quartz (SiO2) with fibrous crocidolite inclusions (dyed)
mineral
Iron-stained Quartzite / Chert
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
metamorphic
Graphite
Graphite (Chemical Formula: C)
Mineral (Native Element)
Red Jasper
SiO2 (Microcrystalline Quartz)
sedimentary
Milky quartz (likely quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Serpentine
Serpentinite (group of hydrous magnesium iron phyllosilicate minerals)
metamorphic
Limonite (Iron Ore/Bog Iron)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Quartzite with Iron Inclusions
Quartzite (primarily SiO2)
metamorphic
Red Jasper with Quartz Veins
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite (Milky)
Metamorphic rock predominantly composed of Quartz (SiO2)
metamorphic
Travertine
Terrestrial Sedimentary Limestone (CaCO3)
sedimentary
Milky quartz (rough quartz crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Weathered iron-rich concretion or ironstone nodule
Goethite–hematite limonite concretion (FeO(OH), Fe₂O₃, and hydrated iron oxides)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral