Schist
Chlorite or Mica Schist
metamorphic
Category
Mineral, Often Found As A Rock (Metamorphic)
Browse mineral, often found as a rock (metamorphic) specimens identified by the Rock Identifier community.
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Dumortierite in Quartz
Silicon Dioxide with Aluminium Borosilicate (SiO2 + (Al,Fe7+)7(BO3)(SiO4)3O3)
mineral
Schist
Mica Schist
metamorphic
Quartzite
Quartzite
metamorphic
Pyrite
Pyrite (FeS2)
Mineral
Chert (Basanite variety) with Quartz Vein
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Vein
Silicon Dioxide (SiO2)
Mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Pebble
Quartzite (SiO2) with mineral inclusions
metamorphic
Chert (and Jasper/Flint variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Gneiss
High-grade foliated metamorphic rock
metamorphic
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Chert (Yellow/Tan Variety)
Chert (SiO2)
sedimentary
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Dumortierite Quartz (Blue Quartz)
Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)
mineral
Chert (Flint Pebbles)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Ruby / Pink Sapphire
Corundum (Al2O3 with Chromium impurities)
gemstone
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Carnelian Agate
Carnelian (Chalcedony / Silicon Dioxide SiO2)
mineral
Limonite (Ironstone)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Quartzite with Druzy Quartz
Silicon Dioxide (SiO2)
metamorphic
Dragon Blood Jasper (Epidote with Piedmontite or Quartz)
Epidote-rich Quartzite / SiO2 with (Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))
metamorphic
Serpentinite
Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)
metamorphic
Chert (often called Flint when dark)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Glauconite
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Carnelian (Chalcedony)
Silicon Dioxide (SiO2) with Iron Oxide impurities
mineral
Rough Star Sapphire (Corundum)
Al2O3 (Aluminum Oxide)
mineral
Garnet Schist
Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)
metamorphic
Chert (specifically Black Chert or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Milky Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Mineral
Apatite
Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Banded Gneiss
Gneiss
metamorphic
Iolite-bearing Gneiss (Cordierite)
Cordierite (Mg2Al4Si5O18) in Gneiss matrix
metamorphic
Chert (Flint with Iron Staining)
Silicon Dioxide (SiO2)
sedimentary
Chert (White Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary