Sandstone
Arenite (SiO2 based)
sedimentary
Category
Igneous, Sedimentary, Or Metamorphic (Mineral Based)
Browse igneous, sedimentary, or metamorphic (mineral based) specimens identified by the Rock Identifier community.
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Biotite (Mica)
Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Quartzite (Aventurine type)
Metamorphosed Quartz Sandstone (SiO2 with inclusions)
metamorphic
Gneiss
Gneiss (foliated metamorphic rock)
metamorphic
Greenschist
Chlorite Schist
metamorphic
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Zebra Jasper
Silicon Dioxide (SiO2) with various inclusions
metamorphic/sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Quartzite
Quartzite; predominantly microcrystalline quartz (SiO₂)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Graphite
Graphite (Chemical Formula: C)
Mineral (Native Element)
Feldspathic Gneiss
High-grade Metamorphic Rock (Gneiss)
metamorphic
Magnetite Ore
Magnetite (Fe3O4)
mineral
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss (Granitic Gneiss)
Gneiss (from German Gneis, related to 'spark')
metamorphic
White Topaz
Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Coarse Sandstone
Arenite (SiO2 based)
sedimentary
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Gneiss
Gneiss
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Mineral
Gneiss (with Quartz and Biotite Mica)
Gneiss
metamorphic
Quartz / Common Opal Transition
Silicon Dioxide (SiO2)
mineral
Tumbled Aventurine
SiO2 (Quartz with Fuchsite inclusions)
mineral
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Epidote
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Apatite
Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))
mineral
Biotite (Black Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH)2)
mineral
Magnetite
Magnetite (Fe3O4)
mineral