Lapis Lazuli
Complex mixture of minerals (lazurite, calcite, pyrite, and sodalite); (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Category
Mineral (Chalcedony)
Browse mineral (chalcedony) specimens identified by the Rock Identifier community.
Quartz Druzy on Matrix (likely Agate or Jasper)
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Quartz with Inclusions
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Quartz Chip
Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian
Volcanic Glass with Spherulitic Cristobalite (SiO2)
igneous
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
sedimentary
Epidosite (Epidote-rich rock)
Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))
metamorphic
Granite
Granite
igneous
Granite
Granite
Igneous
Diamond in Kimberlite
Kimberlite Matrix with Carbon (Diamond)
igneous
Granite
Granite
Igneous
Satin Spar Gypsum
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Chlorite (Small Flakes/Sand)
Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
mineral
Greenschist
Chlorite schist
metamorphic
Petrified Wood
Silicon Dioxide (SiO2) - Calcified / Silicified Wood
sedimentary
Veined Pebble (likely a Quartz-Veined Pebble)
Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)
Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)
Greenschist / Migmatite
Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)
metamorphic
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Phantom Quartz (Chlorite Inclusion)
Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Al)6(Si,Al)4O10(OH)8
mineral
River Cobble (Gneiss/Schist mix)
Foliated Metamorphic Rock (Gneissic/Schistose)
metamorphic
Sandstone (with potentially metamorphic or basaltic bands)
Arenite / Lithic Wacke
sedimentary
Vesicular Basalt (Amygdaloidal)
Amygdaloidal Basalt
igneous
Garnet (Almandine)
Almandine Fe3Al2(SiO4)3
mineral
Amazonite
Amazonite (KAlSi3O8 - Microcline)
mineral
Granite Pebble
Granite (Phaneritic intrusive igneous rock comprising Quartz, Feldspar, and Mica)
igneous
Pegmatite
Coarse-grained Igneous Rock (Granitic Pegmatite)
igneous
Amazonite
K(AlSi3O8) - Microcline
mineral
Red Sandstone
Arenite (primarily Quartz with Hematite cement)
sedimentary
Red Sandstone
Arenite (Fe2O3 rich)
sedimentary
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
sedimentary
Banded Sandstone
Arenite (with iron oxide banding)
sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Quartz (Milky/Crystalline)
Silicon Dioxide (SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Quartz (Milky or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Iron-rich or Arkosic)
Arenite (SiO2 with FeO(OH) or Fe2O3 staining)
sedimentary
Green Sandstone
Glauconitic Sandstone
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary