Engineer Quartz/Quartzite
SiO2 (Silicon Dioxide with binders)
Sedimentary or metamorphic-derived
Category
Sedimentary Or Metamorphic Derived
Browse sedimentary or metamorphic derived specimens identified by the Rock Identifier community.
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Polished Stone Pendant (Identity Unclear)
Unknown (Possibly Jasper/Agate/Quartz mixture)
mineral
Quartz fragment (Pebble)
Silicon Dioxide (SiO2)
mineral
Apatite
Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Clear Quartz (Rock Crystal) Bracelet
Silicon Dioxide (SiO2)
gemstone
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
metamorphic
White Buffalo Turquoise (or Howlite/Magnesite)
Calcite/Dolomite or Magnesite with Chert/Quartz inclusions
gemstone
Rounded gray river cobble
Likely fine-grained sandstone, siltstone, or metamorphosed equivalent; exact identification requires a fresh surface and tests
sedimentary
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Muscovite Schist with Quartz
KAl2(AlSi3O10)(OH)2 in Schistose matrix
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Ruby Zoisite
Anyolite (Calcium aluminium silicate with Chromium/Corundum inclusions)
metamorphic
Granitic Gneiss
Gneiss (Granite-derived)
metamorphic
Jasper (Red Jasper)
Silicon Dioxide (SiO₂)
sedimentary
Gravel / Small Pebble
Rock Fragment (Gravel)
sedimentary
Jasper (Red and Yellow)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
mineral
Chalcedony (Agate) Pebble
Silicon Dioxide (SiO2)
mineral
Pale rounded quartz-rich pebble, likely quartzite
Quartzite (mostly microcrystalline SiO₂), possibly quartz-rich sandstone or vein quartz
metamorphic
Mixed collection of common river stones
Varied lithologies, visibly including quartz-rich rock, dark mafic rock, sandstone, and purple quartz-bearing material
igneous, sedimentary, metamorphic
Carnelian (Orange Agate)
Carnelian (variety of Chalcedony, SiO2)
mineral
Weathered quartz-rich pebble, possibly quartzite or chert
Quartz (SiO₂), possibly quartzite; exact identification is uncertain from the image
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Quartz-rich stone fragment (probable quartzite or chert)
Quartzite, composed predominantly of SiO₂; exact identification is uncertain from the image
metamorphic
Green Aventurine
Quartzite (variety Aventurine) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Exposed aggregate concrete (stone-chip surface)
Portland-cement concrete containing natural aggregate; not a natural rock
sedimentary
Ruby in Zoisite
Anyolite (Ruby in Zoisite)
metamorphic
Quartz Vein in Pelite (Metamorphic Rock)
Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)
metamorphic
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
mineral
Schist (Biotite Schist)
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO₂)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite Nodule
Hematite (Fe2O3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral