Chert (Iron-stained)
Silicon Dioxide (SiO2) with Iron Oxides
sedimentary
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
Learn about Mineral Based Composite in the encyclopedia
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Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Peacock Ore (Bournite/Chalcopyrite)
Bornite (Cu5FeS4) or Acid-Treated Chalcopyrite (CuFeS2)
mineral
Labradorite
Labradorite ((Ca,Na)(Al,Si)4O8)
mineral
Muscovite Mica (on Quartz Matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Glauconite
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
mineral
Fire Agate
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
mineral
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
mineral
Fuchsite
Chromium-rich Muscovite (KAl2(AlSi3O10)(OH,F)2 with Cr replacements)
mineral
Moss Agate
Cryptocrystalline Quartz (SiO2 with manganese or iron oxide inclusions)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Sandstone with Liesegang Rings
Liesegang-banded Sandstone
sedimentary
Pink Granite
Phaneritic Felsic Igneous Plutonic Rock
igneous
Diorite
Diorite
igneous
Red Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt Pebble
Aphanitic Mafic Igneous Rock
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions (SiO2)
igneous
Aqua Aura Quartz
Titanium/Gold-coated Silicon Dioxide (SiO2)
mineral
Golden Healer Quartz (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide inclusions
mineral
Tree Agate
Silicon Dioxide (SiO2) with inclusions of Chlorite or Manganese
mineral
Heat-Treated Citrine
Quartz (Silicon Dioxide, SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Dendritic Opal
Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions
mineral
Tree Agate (Dendritic Agate/Quartz)
Silicon Dioxide (SiO2) with trace Manganese or Iron oxide inclusions
mineral
Gneiss
Metamorphic Gneiss
metamorphic
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Synthetic / Manufactured Artifact
Sand Tiger Shark Tooth
Carcharias taurus (fossilized)
fossil
Dalmatian Jasper
Peralkaline Quartz-Feldspar Porphyritic Rock (Dalmatian Stone)
igneous
Granite (River-worn Pebble)
Phaneritic Igneous Rock (Granitic composition)
igneous
Sandstone (Glauconitic)
Glauconitic Quartz Sandstone (SiO2 + (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Granodiorite
Granodiorite
igneous
Vesicular Basalt
Basalt (Vesicular)
igneous
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Copper-bearing Mica Schist
Mica Schist with Native Copper inclusions
metamorphic
Garnet-Bearing Schist
Almandine Garnet Micaceous Schist
metamorphic
Blue Quartz (Dumortierite Quartz / Celestite)
Silicon Dioxide (SiO2) with inclusions
mineral
Mica Schist
Muscovite/Biotite Schist
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite (Pink/Red Orthoclase variety)
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Sandstone (Quartz-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary