Schist
Mica Schist (primarily consisting of muscovite KAl2(AlSi3O10)(OH)2 or biotite K(Mg,Fe)3(AlSi3O10)(OH)2)
metamorphic
Category
Mineral (Biogenic)
Browse mineral (biogenic) specimens identified by the Rock Identifier community.
Learn about Mineral (Biogenic) in the encyclopedia
View all →
Sandstone (likely Graywacke or Siltstone variety)
Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)
sedimentary
Sandstone
Sandstone (lithified quartz arenite, arkose, graywacke, etc. depending on composition)
Sedimentary Rock
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Basalt
Basalt (extrusive igneous rock)
Igneous
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Jasper with Quartz Veins
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Granitic Pegmatite with Schorl
Granitic Pegmatite (Schorl: NaFe3Al6(Si6O18)(BO3)3(OH)3OH)
igneous
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Fluorite
Fluorite (Calcium Fluoride, CaF2)
Mineral
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Schist
Schist
metamorphic
Vesicular Basalt (Amygdaloidal)
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Rugose Coral (Horn Coral)
Order Rugosa (extinct fossilized coral)
sedimentary
Sandstone (with Liesegang rings or joints)
Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)
sedimentary
Slickenside in Limestone
Tectonized Limestone / Calcite (CaCO3)
metamorphic (localized) or sedimentary
Sandstone
Arenite
sedimentary
Granite
Phaneritic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)
igneous
Piddock bored rock (likely Mudstone or Shale)
Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite
Granite
igneous
![Eudialyte in Matrix (Eudialyte [Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2]) — mineral](https://media.rockidentification.com/90f9ac41-c5b7-4750-a9ab-f8caf4a2e64c-thumbnail.jpg)
Eudialyte in Matrix
Eudialyte [Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2]
mineral
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Sandstone
Arenite
sedimentary
Thulite in Matrix
Pink Zoisite - Ca2Al3(SiO4)3(OH)
metamorphic
Healer's Gold (Pyrite and Magnetite in Schist)
Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist
metamorphic
Fossil Sand Dollar (Echinoidea)
Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)
sedimentary
Spinosaurid Dinosaur Tooth
Spinosaurus aegyptiacus (fossilized)
fossil
Spinosaurus Tooth
Spinosaurus aegyptiacus (fossilized in Hydroxyapatite)
sedimentary
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Banded Gneiss
Gneiss (pronounced "nice")
metamorphic
Granite
Phaneritic Plutonic Rock (Granite)
igneous
Gneiss
Gneiss
metamorphic
Milky Quartz with Iron Staining and Matrix
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Epidote (Greenstone)
Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)
metamorphic
Pink Granite
Felsic intrusive igneous rock
igneous
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic