Carnelian (Orange Agate)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary Or Igneous (Host Environment)
Browse sedimentary or igneous (host environment) specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Igneous (Host Environment) in the encyclopedia
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Pegmatite
Igneous Pegmatite
igneous
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Magnetite
Magnetite (Fe3O4)
Mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Pyrite in Slate
Iron Disulfide (FeS2) in Low-grade Metamorphic Rock
metamorphic
Likely pyrite-bearing rock
Pyrite (FeS₂), possibly in a quartz- or sulfide-rich matrix
mineral
Banded Agate
Silicon Dioxide (SiO2)
mineral
Rough Chalcedony / Jasper Nodules
Silicon Dioxide (SiO2)
mineral
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Greywacke (Stream Pebble with Quartz/Calcite Veins)
Greywacke sandstone / Metagraywacke
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony in Host Rock
Chalcedony (SiO2)
mineral
Ocean Jasper
Silicon Dioxide (SiO2) with various inclusions
igneous/sedimentary mixed (Orbicular Jasper)
Quartz Vein in Basalt or Slate
Hydrothermal quartz vein traversing mafic host rock
metamorphic
Septarian Nodule (Polished)
Septarian concretion (Calcite, Aragonite, Limestone)
sedimentary
Fluorite in Matrix
Fluorite (CaF2) within a host rock matrix
Mineral
Banded calcite (likely cave deposit or vein fragment)
Calcite, CaCO₃
mineral
Biotite-bearing metamorphic rock, likely schist
Mica schist; chiefly quartz, feldspar, and biotite mica
metamorphic
Chrome Diopside
Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities
mineral
Greenstone
Greenschist / Meta-basalt
metamorphic
Pegmatite
Igneous Pegmatite
igneous
Almandine Garnet in Matrix
Almandine (Fe3Al2(SiO4)3)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Concretion
Sedimentary Concretion
sedimentary
Red Jasper
Jasper (Silica/Silicon Dioxide, SiO2 plus iron inclusions)
sedimentary
Jasper with Quartz Veining
Microcrystalline quartz (SiO2) with iron oxide impurities
sedimentary
Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Pyrite-bearing rock, likely quartz vein
Pyrite (FeS₂) in quartz-rich host rock
mineral
Quartz-bearing rock or quartz-rich mineral specimen
Quartz, silicon dioxide (SiO₂); exact host rock is uncertain from the image
mineral
Pyrite-bearing rock (likely pyrite-rich schist or quartzite)
Pyrite, FeS₂, disseminated in a metamorphic host rock
mineral
Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation
SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Yellow Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Ironstone Concretion (Limonite/Goethite)
Ironstone (composed primarily of Goethite FeO(OH) and Limonite)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Ruby (Raw/Rough)
Corundum (Al2O3 with Chromium trace)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary