Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Category
Mineral
Browse mineral specimens identified by the Rock Identifier community.
Learn about Mineral in the encyclopedia
View all →
Gneiss (specifically a Granitic Gneiss)
Gneiss (Composition: Quartz, Feldspar, Mica)
metamorphic
Biotite (Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
![Malachite Coating on Host Rock (Malachite [Cu2CO3(OH)2]) — mineral](https://media.rockidentification.com/1a7d7a0a-a0f4-4453-a981-eda24e0e43f8-thumbnail.jpg)
Malachite Coating on Host Rock
Malachite [Cu2CO3(OH)2]
mineral
Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)
Diorite (Igneous rock, intrusive, intermediate composition)
Igneous Rock
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Granitic Pegmatite (Muscovite and Quartz)
Pegmatite (KAl2(AlSi3O10)(OH)2 / SiO2)
igneous
Granite Gneiss
Granitic Gneiss
Metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Chrysocolla
Hydrated copper silicate - Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Milk Quartz (White Quartz)
Silicon Dioxide (SiO2)
mineral
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
Mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Banded Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartz with Mica inclusions (Pegmatite)
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Feldspar-Quartz Rock (likely Pegmatite or Granite)
Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)
igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
Mineral
Pyromorphite
Pyromorphite (Pb5(PO4)3Cl)
mineral
Fluorite (Fluorescent)
Calcium Fluoride (CaF2)
mineral
Shattuckite (Blue Quartz/Jasper Matrix)
Shattuckite (Copper Silicate Hydroxide - Cu5(SiO3)4(OH)2)
mineral
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
metamorphic
Druzy Quartz on Ironstone
Silicon Dioxide (SiO2) on Limonitic Ironstone
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Goldstone (Brown)
Aventurine glass
mineraloid (man-made)
Basalt River Stone with Mineral Crust
Aphanitic Mafic Igneous Rock
igneous
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite/Limonite
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Turquoise or Chrysocolla (Inlaid Jewelry)
Hydrated copper aluminum phosphate / Hydrated copper phyllosilicate
mineral
Ironstone (likely Limonite or Goethite nodule)
Hydrothermally altered Ferric Hydroxide (FeO(OH)·nH2O)
sedimentary
Limonite with Hematite
Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
mineral