Milky Quartz (Quartz Vein)
Silicon Dioxide (SiO2)
mineral
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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Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Painted River Rock
Artificially Coated Sedimentary Rock
sedimentary
Biotite Mica in Host Rock
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2)
sedimentary
Apatite
Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Quartzite with inclusions
Metamorphic Rock (Mainly SiO2)
metamorphic
Limonite (Ironstone)
Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (Silicon dioxide, SiO2)
metamorphic
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (a metamorphic rock)
Metamorphic
Green Quartzite (Aventurine-like)
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Quartz
Silicon dioxide (SiO2)
mineral
Glauconite
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade foliated metamorphic rock
metamorphic
Pyrite-bearing Rock / Pyrite Ore
Iron Sulfide (FeS2) in host rock matrix
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Blue Sapphire
Corundum (Al2O3 with iron and titanium trace elements)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Chert (often called Flint when dark)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Chert (variations like Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within metamorphic/igneous matrix
igneous/metamorphic
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Lapis Lazuli
Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Epidote with Quartz/Feldspar
Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) with associated minerals in a host rock
Mineral/Metamorphic rock
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Eclogite (retrograded)
Eclogite (Omphacite-Garnet rock)
metamorphic
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Likely garnet-bearing rock
Garnet in a dark metamorphic matrix; garnet is commonly almandine, Fe₃Al₂(SiO₄)₃
metamorphic
Gneiss with Quartz Vein
Metamorphic Gneiss with Quartz (SiO2) and Feldspar Injection
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic