Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Mineral
Category
Mineral With Metamorphic Or Igneous Host
Browse mineral with metamorphic or igneous host specimens identified by the Rock Identifier community.
Learn about Mineral With Metamorphic Or Igneous Host in the encyclopedia
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Quartz Vein in Rhyolite
Silicon Dioxide (SiO2) in extrusive igneous rock
igneous
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
mineral
Magnetite Ore
Magnetite (Fe3O4)
mineral
Pyrite Cubes in Matrix
Iron Disulfide (FeS2) in Host Matrix
mineral side rock
Pegmatite
Igneous Pegmatite (Quartz-Feldspar-Mica)
igneous
Quartz with Mica inclusions (Pegmatite)
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
igneous
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Lapis Lazuli (in Matrix)
Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2
metamorphic
Faceted yellow gemstone, likely citrine
Citrine (quartz), SiO₂; possibly yellow sapphire or synthetic glass without testing
gemstone
Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Common Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineraloid
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities
mineral
![Lapis Lazuli (Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite) — metamorphic](https://media.rockidentification.com/f914c118-fe45-4316-a33a-49fa9c50cbe7-thumbnail.jpg)
Lapis Lazuli
Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite
metamorphic
![Lapis Lazuli (Raw Ore) (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)) — metamorphic](https://media.rockidentification.com/de49c560-8228-4eb1-8165-e9ac490799d5-thumbnail.jpg)
Lapis Lazuli (Raw Ore)
Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)
metamorphic
Agate
Silicon Dioxide (SiO2)
mineral
Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)
Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)
mineral
Tiger's Eye
Silicon Dioxide (SiO2) with Limonite/Goethite pseudomorphs after Crocidolite
Mineral
Jadeite
Jadeite (NaAlSi2O6)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Crystalline)
Silicon Dioxide (SiO2)
mineral
Blue cabochon gemstone ring
Uncertain; likely blue sapphire (corundum, Al₂O₃), blue topaz, or synthetic glass/spinel
gemstone
Milky Quartz Vein with Matrix
Silicon Dioxide (SiO2)
mineral
Pyrite in Slate
Iron Disulfide (FeS2) in Low-grade Metamorphic Rock
metamorphic
Ruby and Diamond in Gold Setting
Corundum (Al2O3) and Diamond (C)
mineral
Greenstone / Serpentinite
Serpentinite (composed primarily of serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz with Chlorite / Greenschist
Quartz vein in Greenschist (SiO2 with Chlorite group minerals)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Altered Host Rock
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
mineral
Fuchsite in Quartz
Muscovite (KAl2(AlSi3O10)(OH)2) containing Chromium + Quartz (SiO2)
metamorphic
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate) - a variety of Microcline Feldspar
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Emerald (Tumbled Beryl)
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Emerald
Beryl (Be₃Al₂(SiO₃)‑₆) with Chromium/Vanadium impurities
mineral
Amygdaloidal Basalt with Agate/Zeolite Amygdules
Basalt (extrusive igneous rock) containing secondary mineral fillings
igneous