Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
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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Sandstone
Clastic sedimentary rock (Arenite)
sedimentary
Sandstone (lithic wake/graywacke variety)
Arenite/Greywacke (SiO2 with lithic fragments)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Epidote in Basalt
Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)
igneous
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
igneous
Sandstone
Arenite (SiO2 primarily)
sedimentary
Basalt with Epidote (Greenstone)
Epidote-bearing Metabasalt
metamorphic
Zebra Jasper
Silicon Dioxide (SiO2) with various inclusions
metamorphic/sedimentary
River Gravel
Polymictic Gravel / Detrital Rock Aggregate
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert with Quartz Veining
Microcrystalline Silica (SiO2)
sedimentary
Sandstone (with potentially metamorphic or basaltic bands)
Arenite / Lithic Wacke
sedimentary
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Mica Schist
Mica Schist
metamorphic
Blue Topaz
Aluminum Silicate Fluoride Hydroxide Al2SiO4(F,OH)2
mineral
Apatite
Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))
mineral
Granitoid (Granite/Granodiorite)
Plutonic igneous rock (variable composition, primarily SiO2)
igneous
Muscovite Mica
Muscovite (Potassium Aluminum Silicate Hydroxide), KAl2(AlSi3O10)(OH)2
mineral
Dalmatian Jasper
Dalmatian Stone (Felsite with Arfvedsonite/Tourmaline)
igneous
Gneiss (High-grade Metamorphic Rock)
Gneiss
metamorphic
Pink Granite
Phaneritic Intrusive Igneous Rock (Granite)
igneous
Mica Schist
Crystalline Schist (often primarily Muscovite or Biotite sheet silicates)
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Sandstone Cobble
Arenite (Sandstone)
sedimentary
Pyrite in Matrix with Copper Alterations
Iron Sulfide (FeS2) with secondary Copper carbonates/sulfides
mineral
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide) with Chlorite or Iron/Manganese inclusions (SiO2)
mineral
Ferruginous Sandstone
Arenite with Iron-oxide cement
sedimentary
Sandstone
Arenite
sedimentary
Crushed Stone / Gravel
Aggregatus saxum (variable mineral composition)
sedimentary
Scoria (Lava Rock)
Mafic extrusive volcanic rock (Scientific formula varies based on mineral content: primarily SiO2, MgO, and FeO)
igneous
Moss Agate
Silicon Dioxide (Chalcedony variety) with green hornblende or chlorite inclusions - SiO2
gemstone
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 cement)
sedimentary
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Mineral
Basalt with Epidote (Porphyritic Basalt)
Mafic Porphyritic Basalt with (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) inclusions
igneous
Sandstone (likely Graywacke or Arkose)
Arenite
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary