Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia
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Serpentinite
Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite)
metamorphic
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)
Metamorphic Rock
Unidentified Rock Fragment
Unknown
Rock
Devil's Toenail
Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)
sedimentary
Mica Schist
Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)
metamorphic
Greenschist
Greenschist (comprising Actinolite, Chlorite, and Epidote)
metamorphic
Sandstone (likely Siltstone or Mudstone)
Clastic sedimentary rock (primarily SiO2 with various oxides)
sedimentary
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineral
Unakite
Epidotized Granite
metamorphic
Banded Gneiss
Foliated Gneiss
metamorphic
Quartzite / Sandstone / Chert Mix
Silicon Dioxide (SiO2)
sedimentary and metamorphic
Leopard Skin Jasper
Jasper (Silicon Dioxide with impurities), SiO2
sedimentary
Unakite
Unakite (Epidotized Granite)
metamorphic
Gneiss
Gneiss
metamorphic
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
Igneous
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Schist
Mica Schist
metamorphic
Garden Quartz (Lodolite)
Quartz with inclusions (SiO2 + various inclusions such as Chlorite, Hematite, or Feldspar)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Garnet Schist
Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)
metamorphic
Limonite Geode (Ironstone Concretion)
FeO(OH)·nH2O (Hydrated Iron Oxide)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions
metamorphic
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock
Mica Group Minerals
There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).
Mineral
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Amber (Copal)
Succinite (fossilized resin)
mineral
Metaconglomerate
Metaconglomerate (Quartzite conglomerate)
metamorphic
Schist (Biotite/Mica Schist)
Medium-grade regional metamorphic rock (rich in Phyllosilicates)
metamorphic
Granitic Gneiss
Gneiss (Polymetamorphic Granitic Gneiss)
metamorphic
Shale
Shale (clastic sedimentary rock composed of silt and clay-sized particles)
sedimentary
Eclogite
Eclogite (Omphacite-Garnet Rock)
metamorphic
Blue Sapphire
Corundum (Al2O3 - Aluminum Oxide with Iron and Titanium impurities)
mineral
Orange Quartz / Quartzite
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Glaucophane Schist (Blueschist)
Blueschist (Glaucophane-bearing schist)
metamorphic
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Chrysocolla (on host rock)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Copper silicate)
mineral
Quartz Mineral Specimens
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Quartz
Quartz (Silicon Dioxide) with blue inclusions (SiO2)
mineral
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
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