Iron Meteorite / Chondrite (Possible)
Extraterrestrial stony-iron or chondritic meteorite
meteorite
Category
Mineralogical Specimen
Browse mineralogical specimen specimens identified by the Rock Identifier community.
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Agate
Silicon Dioxide (Chalcedony variety), SiO2
gemstone
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Geode / Fossilized Gastropod or Shell Cast
Silicon dioxide (Quartz) replacement / fossil mold
sedimentary
Brecciated Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Raw Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Copper Ore (Malachite and Limonite bearing rock)
Copper-bearing rock with secondary copper minerals
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Green Jasper Pebble
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities, microcrystalline quartz
sedimentary
Bismuthinite with Chalcopyrite and Quartz
Bismuthinite (Bi2S3) and Chalcopyrite (CuFeS2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Common Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Chrysocolla in Quartz
Hydrated copper phyllosilicate with silicon dioxide (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O + SiO2)
mineral
Quartz Vein Rock with Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide with inclusions (SiO2)
mineral
Gold-bearing Quartz with Iron Oxides
Quartz (SiO2) with Limonite/Goethite (FeO(OH)) and Pyrite (FeS2)
mineral
Azurite Malachite
Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)
mineral
Bloodstone
Heliotrope
Mineral
Chert (Sea-worn Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony (Agate/Jasper mix)
Cryptocrystalline Quartz (SiO2)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) - Variety: Chalcedony
mineral
Greenstone, likely altered basalt
Metabasalt (chlorite–actinolite–epidote assemblage), likely greenschist-facies greenstone
metamorphic
Druzy Quartz Geode (with Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz (Chalcedony/Agate)
Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone with Crinoid Stem
Sedimentary Rock with Echinodermata fossil fragment
fossil
Concretion
Septarian Concretion (Fragmentary)
sedimentary
Orbicular gneiss (likely augen gneiss)
Quartz–feldspar–biotite gneiss; locally termed augen gneiss
metamorphic
Possible fossilized shell or coral fragment
Indeterminate biogenic carbonate, likely calcite (CaCO₃)
fossil
Fossil Assortment and Geological Specimens
Various (including Ammonoidea)
fossil
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Feldspar (likely Amazonite or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Quartz-bearing polymictic conglomerate
Conglomerate with milky quartz clasts; composition may include quartzite and weathered feldspathic/mafic rock fragments
sedimentary