Jasper or Agate
Silicon dioxide (SiO2)
Mineral
Category
Mineral Like Byproduct (Technogenic)
Browse mineral like byproduct (technogenic) specimens identified by the Rock Identifier community.
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Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite inclusions
sedimentary
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
Mineral
Moqui Marble
Hematite-Goethite Concretion (Fe2O3 / FeO(OH))
mineral
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Glauconitic Sandstone
Glauconitic Quartz Arenite (with K,Mg,Fe,Al silicate hydroxide)
sedimentary
Epidosite (Epidote-Quartz rock)
Epidote-rich hydrothermal rock
metamorphic
Fulonite (Fulgurite-like)
Fulgurite (SiO2 fused silica/lechatelierite)
Metamorphic (Pseudo-igneous)
Snowflake Obsidian
Volcanic Glass with Spherulitic Cristobalite (SiO2)
igneous
Gneiss
Gneiss
metamorphic
Brown Sandstone
Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)
sedimentary
Desert Rose (Barite Rose / Gypsum Rose)
Barium Sulfate (BaSO4) or Hydrous Calcium Sulfate (CaSO4%22H2O)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Granite
Course-grained intrusive igneous rock
igneous
Quartz (Smoky/Granular variety)
Silicon Dioxide (SiO2)
mineral
Obsidian
Obsidian (Volcanic Glass)
igneous
Greenstone / Epidosite
Metamorphosed Mafic Igneous Rock (Epidote-Chlorite group)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Green Aventurine
SiO2 (Quartz with Fuchsite inclusions)
mineral
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Sandstone
Arenite
sedimentary
Concretion (Sandstone)
Sandstone Concretion
sedimentary
Lepidolite in Pegmatite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite)
metamorphic
Quartz with Mica / Chlorite Inclusion
Silicon Dioxide (SiO2) with Phyllosilicate minerals
metamorphic
Gneiss
Gneiss
metamorphic
Limonite
FeO(OH)·nH2O
mineral
Greenstone
Metabasalt / Chlorite Schist
metamorphic
Pegmatite (Granitic)
Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)
igneous
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxide
mineral
Flower Agate
Chalcedony (SiO2) with Platy inclusions
mineral
Garden Quartz (Phantom Quartz)
Silicon Dioxide (SiO2) with inclusions (Chlorite, Feldspar, Goethite, Hematite)
Mineral
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Pegmatite (Granitic)
Granitic Pegmatite
igneous
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Sapphirine in Matrix
Sapphirine (Mg,Al)8(Al,Si)6O20
mineral
Vanadinite
Pb5(VO4)3Cl
mineral
Orbicular Granite
Orbicular Granidiorite / Plutonic Igneous Rock
igneous
Blue Quartzite (Blue Aventurine)
SiO2 (Silicon Dioxide with Dumortierite/Crocidolite inclusions)
metamorphic
Fossil Shark Tooth (embedded in matrix)
Lamniformes (likely Cretalamna or Squalicorax) within phosphatic/calcareous matrix
sedimentary