Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Category
Mineral_rock
Browse mineral_rock specimens identified by the Rock Identifier community.
Black Obsidian and Hematite
Volcanic Glass (SiO2) and Hematite (Fe2O3)
igneous and mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Agate (specifically Carnelian Agate or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Eudialyte in Matrix
Na15Ca6Fe3Zr3Si26O72(OH,Cl,H2O)3
mineral
Sandstone (Ferruginous)
Arenite (Fe2O3 staining)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Chatoyant Quartz (Cat's Eye Quartz)
Silicon Dioxide (SiO2) with fibrous inclusions of Amphibole or Rutile
mineral
Aventurine (Tan/Cream colored)
Quartz (SiO2) with mineral inclusions
mineral
Dalmatian Stone (commonly called Dalmatian Jasper)
Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)
igneous
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Granite (Dioritic or Hornblende-rich)
Phaneritic Plutonic Felsic to Intermediate Igneous Rock
igneous
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Metamorphic Rock
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Green Slate (Greenstone)
Metamorphic shale (varied composition)
metamorphic
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Basalt with Limonite stains
Extrusive mafic igneous rock; Limonite (FeO(OH)·nH2O)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Unakite
Unakite (Metasomatized Granite)
metamorphic
Granite (Pink/Potassium Feldspar Granite)
Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)
igneous
Granite (Pink/Red)
Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)
igneous
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
![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
Basalt
Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)
igneous
Gneiss
Gneiss
metamorphic
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Olivine Basalt
Mafic Volcanic Rock (rich in (Mg, Fe)2SiO4)
igneous
Quartz (Gravel fragment)
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone (Ferruginous)
Arenite (Fe2O3 stained)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Fuchsite Schist
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist
metamorphic
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Pink Satin Spar (Satin Spar Selenite Dyed)
Gypsum (CaSO4·2H2O)
mineral
Schist (Biotite Schist)
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Geode with Iron-Stained Quartz/Calcite
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) in Sedimentary Matrix
sedimentary
Basalt with Quartz Veins
Basalt (composition: SiO2, MgO, FeO, Al2O3, CaO)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
River Pebble (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) mixture with varied clastic minerals
sedimentary/metamorphic
Quartzite / Sandstone / Chert Mix
Silicon Dioxide (SiO2)
sedimentary and metamorphic