Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
Sedimentary (Secondary Classification: Cryptocrystalline Quartz)
Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.
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Tumbled jasper (likely picture jasper)
Jasper, an opaque microcrystalline variety of quartz (SiO₂); exact variety uncertain from the photo
mineral
Quartzite / Quartz Geodeoid Nodules
Silicon Dioxide (SiO2)
metamorphic
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
mineral
Agate (Common Chalcedony)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 secondary)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Rhodochrosite with Quartz
Manganese Carbonate (MnCO3) with Silicon Dioxide (SiO2)
mineral
Chert (Jasper-like Silicate)
Microcrystalline Quartz (SiO2)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Greenschist
Chlorite Schist
metamorphic
Dyed Imperial Jasper
SiO2 (Silicon Dioxide)
gemstone
Specular Hematite with Quartz and Limonite
Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)
Mineral
Quartz with iron staining
Silicon dioxide (SiO2)
mineral
Quartz Geode in Sedimentary Host Rock
Silicon Dioxide (SiO2) in Carbonate Matrix
sedimentary
Smoky Quartz / Chalcedony
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Carnelian (Silicon Dioxide - SiO2)
sedimentary
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial colorants
Mineral (variety of Chalcedony)
Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Quartz geode
Microcrystalline and crystalline quartz, SiO₂, likely with chalcedony and iron-oxide staining
mineral
Milky Quartz Nodule / Geode precursor
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Chrysocolla on Matrix
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Orbicular rhyolite (orbicular jasper-like volcanic rock)
Silica-rich rhyolite containing concentric feldspar–quartz orbicules, commonly with iron-oxide staining
igneous
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Quartz Vein in Hematitic Siltstone
Hydrothermal Quartz (SiO2) in Ferriferous Matrix
metamorphic
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)
mineral
Lichen-covered granite or granitic gneiss
Granite: quartz + feldspar + mica; possibly gneiss if foliation is confirmed
igneous
Tiger’s eye
Quartz variety, primarily silicon dioxide (SiO₂); fibrous quartz pseudomorph after crocidolite asbestos
gemstone
Jasper / Chert (Iron-stained Quartz)
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
sedimentary
Quartz-veined Sandstone Pebble
Quartzose Sandstone with Quartz Veinlets
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz on Limestone
Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)
Mineral on Sedimentary
Chert (Common Opal variant)
Silicon Dioxide (SiO2)
sedimentary
Limestone with Calcite Veining
Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral