Greywacke
Dirty Sandstone (Lithic wacke)
Category
Browse sedimentary or igneous associated mineral specimens identified by the Rock Identifier community.
Greywacke
Dirty Sandstone (Lithic wacke)
Greenstone (Epidote/Chlorite-rich Metabasalt)
Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))
Nephrite Jade
Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
Granite
Intrusive Igneous Rock
Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)
Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Vesicular Basalt (Scoria)
Extrusive Mafic Volcanic Rock (FeO-SiO2-MgO)
Malachite
Copper carbonate hydroxide [Cu2CO3(OH)2]
Sandstone (Greywacke)
Arenite / Wacke (SiO2 + varied clasts)
Graphite
Graphite (Carbon, C)
Chert (Green Jasper)
Microcrystalline Quartz (SiO2) with iron silicate inclusions
Orbicular Jasper (Eye Jasper / Kambaba-like pattern)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Diorite
Diorite (Intermediate intrusive igneous rock)
Honey Calcite
Calcite (Calcium Carbonate, CaCO3)
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Carnelian Agate
Chalcedony (Silicon Dioxide, SiO2) with Iron Oxide impurities
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
Diorite
Phaneritic Intrusive Igneous Rock (Intermediate Composition)
Dalmatian jasper
Orbicular rhyolite, commonly marketed as Dalmatian jasper; quartz–feldspar volcanic rock with dark aegirine/arfvedsonite-like inclusions
Granitic Pegmatite
Granite Pegmatite (principally KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)
Pink Granite
Phaneritic Igneous Rock (high K-Feldspar content)
Red Sandstone (Hematitic)
Clastic sedimentary rock (SiO2 with Fe2O3 inclusions)
Basalt and Andesite Gravel
Aphanitic Mafic-Intermediate Volcanic Rock
Quartz-rich metallic sulfide ore (probable pyrite-bearing rock)
Pyrite, FeS₂, in a quartz-rich host; exact identification is uncertain from the image
Serpentine
Antigorite-Lizardite-Chrysotile (Mg3Si2O5(OH)4)
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Diorite (Salt and Pepper Rock)
Diorite
Jasper (Iron Oxide Rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite/Goethite) inclusions
Fluorite
Calcium Fluoride (CaF2)
Granitic Pegmatite with Schorl
Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Clear Quartz
Silicon Dioxide (SiO2)
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
Granitic Pegmatite
Phaneritic Granite with Potassium Feldspar (KAlSi3O8), Quartz (SiO2), and Plagioclase
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
Garnet Schist
Garnetiferous Micaceous Schist
Milky Quartz
Silicon Dioxide (SiO2)
Rhyolite
Extrusive Felsic Igneous Rock
Rhyolite
Extrusive Felsic Igneous Rock
Petrified Wood
Silicified Wood (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Hematite
Iron(III) oxide (Fe2O3)