Chalcedony (Agate / Quartz Nodule)
Silicon Dioxide (SiO2)
Category
Browse mineral based human made alloy specimens identified by the Rock Identifier community.
Chalcedony (Agate / Quartz Nodule)
Silicon Dioxide (SiO2)
Quartz (Chert / Agate / Chalcedony)
Silicon Dioxide (SiO2)
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron inclusions
Yellow Ochre / Limonite
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Epidote
Epidote - Ca2(Al,Fe)3(SiO4)3(OH)
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline quartz (SiO2)
Chert (specifically Banded Chert or Flint)
Microcrystalline Quartz (SiO2)
Red Chert (Jasper)
Silicon Dioxide (SiO2)
Chert (Iron-stained)
Microcrystalline silica (SiO2) with trace Iron oxide (Fe2O3)
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Nodule)
Silicon Dioxide (SiO2)
Red Chert (Jasper)
Silicon Dioxide (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Chert / Flint Pebble
Chert (SiO2)
Sandstone pebble
Sandstone (mainly Quartz, SiO2)
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
Rock Fragment with Calcite/Quartz Vein
Polymictic Rock Fragment (SiO2 / CaCO3)
Dendritic Quartz Pebble
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
Granodiorite (or Granite) Pebble
Phaneritic Felsic Igneous Pebble
Dyed Agate
Silicon Dioxide (SiO2) - Chalcedony variety
Quartz with Mica / Chlorite Inclusion
Silicon Dioxide (SiO2) with Phyllosilicate minerals
Limonite and Goethite (Ironstone)
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
Granite
Phaneritic plutonic igneous rock (SiO2 range 65-75%)
Basalt
Aphanitic Mafic Igneous Rock
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
Sandstone
Arenite (SiO2 principal)
Biotite Mica
K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2
Mica Schist with Quartz
Muscovite/Biotite Schist
Chert
Microcrystalline Quartz (SiO2)
Quartz (or Chert/Flint)
Silicon Dioxide (SiO2)
Yellow Ocher (Limonite)
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
Native Copper
Native Copper (Cu)
Chalcedony on Matrix
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2) within a geode
Native Copper
Native Copper (Cu)
Chert (Iron-stained)
Silicon Dioxide (SiO2)