Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
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Granite
Granite (Felsic Plutonic Rock)
igneous
Basalt with Plagioclase Porphyry
Porphyritic Basalt
igneous
Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)
Phylum Echinodermata, Class Echinoidea
sedimentary
Fossiliferous Shale
Laminated Mudrock with plant fossils
sedimentary
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Granite
Phaneritic Plutonic Felsic Rock (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 + SiO2)
igneous
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)
Greenschist
Chlorite schist
metamorphic
Mica Schist
Mica Schist (Complex Silicate Rock)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Quartzite with Mica
Metamorphic Quartzite (SiO2 + Mica phyllosilicates)
metamorphic
Granite (Micro-specimen)
Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Gossan (Iron Hat)
Iron oxide-rich weathered rock (primarily Limonite and Goethite with secondary Quartz)
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide - SiO2)
Mineral
Milky Quartz with Chlorite/Iron staining
Silicon Dioxide (SiO2) with inclusions
mineral
Bull Quartz (White Quartz)
Silicon Dioxide (SiO2)
mineral
Laterite (Iron-rich bauxite or Gossan)
Ferricrete (Fe2O3·nH2O)
sedimentary
River Cobble (Conglomerate context)
Unconsolidated Fluvial Alluvium (comprised of various lithologies like Quartzite, Granite, or Basalt)
sedimentary
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Sandstone Cobble
Clastic Sedimentary (Sandstone)
sedimentary
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2 with various lithic fragments)
sedimentary
Muscovite Mica
Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2
mineral
Basalt with Weathering Rind
Basalt (Mafic Volcanic Rock)
igneous
Sandstone (likely Arkosic or Quartzose)
Sandstone (SiO2 with inclusions)
sedimentary
Wishing Stone (Basalt with Quartz Vein)
Basalt containing a microcrystalline quartz (SiO2) or calcite vein
igneous
Epidote with Quartz
Ca2(Al,Fe)3(SiO4)3(OH) (Epidote) / SiO2 (Quartz)
mineral
Basalt with Calcite Veining
Aphanitic Mafic Igneous Rock (Basalt) with CaCO3
igneous
Sandstone (Greywacke)
Arenite/Greywacke (SiO2 major)
sedimentary
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Talc (Soapstone variety)
Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2
mineral
Snowflake Obsidian
Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)
igneous
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)
metamorphic
Fuchsite (Green Muscovite in Quartz)
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Fossilized Rugose Coral (Horn Coral)
Order Rugosa
fossil
Dalmation Stone
Peralkaline Rock (Microcline Quartz mixture with Arfvedsonite)
igneous
Fossilized Favosites (Honeycomb Coral)
Favosites (extinct genus of tabulate coral)
sedimentary
Dragon Vein Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Granite
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous