Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Mineral
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Moonstone (specifically White Moonstone or Girasol Quartz)
Potassium aluminum silicate (KAlSi3O8)
mineral
Moonstone (Variety of Orthoclase Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar (Sunstone variety)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Pyrope Garnet
Magnesium aluminum silicate (Mg3Al2Si3O12)
mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Feldspar (Orthoclase/Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Mineral
White Moonstone (Feldspar)
Potassium aluminum silicate (KAlSi3O8)
mineral
Orthoclase (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Tiger's Eye (Rough)
Macrocrystalline Quartz (SiO2 with inclusions of Crocidolite)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2) with hematite/limonite inclusions
mineral
Cream Marble (Speckled)
Metamorphosed Limestone (mainly CaCO3)
metamorphic
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (with Quartz veins)
Microcrystalline quartz (SiO2)
sedimentary
Common Opal
Hydrated silica (SiO2 " nH2O)
mineral
Slag
Anthropogenic glassy silicate
Mineral-like byproduct
Charoite
Charoite, K(Ca,Na)2Si4O10(OH,F)·H2O
metamorphic
Chert (varietal known as Jasper or Flint)
Silicon Dioxide (SiO2)
Sedimentary Rock
White Jade (Nephrite or Jadeite)
Tremolite-Actinolite series (Nephrite) or NaAlSi2O6 (Jadeite)
metamorphic
Chert (Brown Variety)
Silicon dioxide (SiO2)
sedimentary
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
sedimentary
Green Jasper (Agate-Jasper mixture)
Silicon Dioxide (SiO2) with impurities
sedimentary
Cherry Creek Jasper (also known as Red Creek Jasper or Cherry Creek Agate)
Jasper, microcrystalline quartz (SiO₂)
Sedimentary Rock
Talc
Talc (Mg₃Si₄O₁₀(OH)₂)
Mineral
Chert (and Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Limonite after Pyrite (Prophecy Stone)
Limonite (FeO(OH)·nH2O) replacing Pyrite (FeS2)
Mineral pseudomorph
Tiger's Eye
Silicon Dioxide with inclusions (SiO2)
mineral
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Chrysocolla
Chrysocolla: Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O
mineral
Pallasite Meteorite (likely Imilac or Brenham)
Stony-Iron Meteorite (Pallasite)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Eudialyte in Matrix
Na15Ca6Fe3Zr3Si26O72(OH,Cl,H2O)3
mineral