Chert (Banded Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
Learn about Mineral (Silicate Replaced Organic Material) in the encyclopedia
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Travertine
Terrestrial Sedimentary Limestone (CaCO3)
sedimentary
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Green Quartzite (with Fuchsite)
Quartzite with Muscovite variety Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Chert (specifically Flint or Common Opal)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper influence)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Yellow Jasper / Chert
Jasper (Silica/Quartz) - SiO2
sedimentary
Chert (variations include Flint/Jasper)
Chert (SiO2)
sedimentary
Chert (potentially Jasper/Common Opal mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Pearl
Pearl (Calcium Carbonate with organic conchiolin, CaCO3)
mineral
Chert (and/or Chalcedony)
Microcrystalline Silica (SiO2)
sedimentary
Howlite
Howlite (Ca2B5SiO9(OH)5)
mineral
Chrysocolla in Quartz (Gem Silica)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / SiO2 (Quartz)
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Chert (Jasper/Black Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (Gravel)
Microcrystalline silica (SiO2)
sedimentary
Chert (specifically Flint or Common Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Limonite (Pseudomorph after Pyrite/Marcasite)
Hydrated Iron Oxide (FeO(OH)·nH2O)
mineral
Chert (Jasper variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (and Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Coquina / Shell Limestone
Coquina (Bioclastic Limestone)
sedimentary
Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (specifically Flint or Jasper variant)
Silicon Dioxide (SiO2)
sedimentary
Chert
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Epidote in Quartz (Unakite-like specimen)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Quartz (SiO2)
metamorphic
Amber
Succinite (specific to Baltic amber), fossilized tree resin
Organic Mineraloid
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Diorite (Salt and Pepper Rock)
Diorite
igneous
Jasper-Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fancy Jasper (Agate/Chert mix)
Silicon Dioxide (SiO2) with impurities
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chatoyant Quartz (Cat's Eye Quartz)
Silicon Dioxide (SiO2) with fibrous inclusions of Amphibole or Rutile
mineral
Chert (Yellow/Tan)
Microcrystalline Quartz (SiO2)
sedimentary