Chert (Jasper variation)
Chert (Silicate mineral, SiO2)
Category
Browse mineral based human made alloy specimens identified by the Rock Identifier community.
Chert (Jasper variation)
Chert (Silicate mineral, SiO2)
Glauconite
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Fossil Shark Tooth
Carcharhiniformes fossil (likely Carcharhinidae family)
K2 Jasper (K2 Granite)
Azurite-in-Granite
Desert Rose (Gypsum Rose / Barite Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O) or Barium Sulfate (BaSO4) with Sand inclusions
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
Basalt
Basalt (Mafic volcanic rock)
Basalt
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
Basalt
Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)
Mica Schist
Schist (Muscovite-Biotite Schist)
Chert (with potential fossil inclusion)
Microcrystalline Quartz (SiO2)
Dragon Vein Agate
Chalcedony (cryptocrystalline silica, SiO2) variety Agate
Amber Agate / Carnelian
Chalcedony (Silicon Dioxide, SiO2)
Granite
Granite (Felsic Plutonic Rock)
Chert (Flint Nodule)
Microcrystalline and Cryptocrystalline Quartz (SiO2)
Chert Pebble (Jasper variety)
Microcrystalline Quartz (SiO2)
Gneiss (with Granite/Pegmatite Vein)
Foliated Metamorphic Rock (Quartz-Feldspar Gneiss)
Granite
Granite (Felsic Plutonic Rock)
Granite
Phaneritic Felsic Igneous Rock
Granite
Granite (Felsic Plutonic Rock)
Granite
Granite
Limestone Breccia
Sedimentary Breccia (Calcareous)
Granite
Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)
Granite
Granite (compositionally: Quartz, Feldspar, Mica)
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
Fuchsite
K(Al,Cr)2(AlSi3)O10(OH)2
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Raw Topaz
Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Stichtite (often found in Serpentinite)
Stichtite Mg6Cr2CO3(OH)16·4H2O
Aquamarine
Beryl (Be3Al2Si6O18)
Beryl (Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)
Aquamarine
Beryl (Be3Al2Si6O18 with Fe2+ impurities)
Amygdaloidal Basalt
Amygdaloidal Basalt
Amazonite
Potassium feldspar (KAlSi3O8)
Greenstone or Chlorite Schist
Greenschist / Chlorite schist
Lepidolite in Pegmatite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite)
Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Quartz Geode
Quartz (Silicon Dioxide, SiO2) Geode