Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic Or Sedimentary (With Staining)
Browse metamorphic or sedimentary (with staining) specimens identified by the Rock Identifier community.
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Quartzite River Cobble
Quartzite (dominated by SiO2)
metamorphic
Iron-rich quartzite or ferruginous metamorphic rock
Ferruginous quartzite, likely hematite/goethite-bearing quartzite; SiO₂ with Fe₂O₃/FeO(OH)
metamorphic
Likely biotite-bearing metamorphic rock (schist or gneiss)
Mica schist/gneiss; chiefly quartz, feldspar, and biotite mica
metamorphic
Quartzite with inclusions
Metamorphic Quartzite (SiO2)
metamorphic
Green Jasper (Chert)
Microcrystalline Quartz (SiO2) with iron/clay inclusion
sedimentary
Weathered sandstone or iron-rich sedimentary fragment
Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂-dominant)
sedimentary
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Weathered quartz-rich metamorphic rock
Likely quartzite or quartz-rich gneiss; exact identification requires a fresh surface and testing
metamorphic
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
mineral
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Limonite (Ochreous Sandstone)
Hydrous ferric oxides (FeO(OH)qnH2O)
sedimentary
Schist
Mica Schist (Metamorphic Rock)
metamorphic
Orange calcite fragment
Calcite (CaCO₃), likely iron-stained or orange-colored calcite
mineral
Milky Quartz with Algae/Chlorite
Silicon Dioxide (SiO2)
mineral
Jasper with Epidote (Unakite-related)
Epidotized Quartzite (composed of Quartz, Epidote, and Feldspar)
metamorphic
Tumbled yellow quartz-rich stone, likely yellow jasper or quartzite
Jasper/quartzite; mainly microcrystalline quartz (SiO₂), with iron-oxide staining
metamorphic
Polished jasper pebble
Jasper, microcrystalline quartz (SiO₂) with iron-oxide and clay-mineral impurities
metamorphic
Sandstone with Iron Oxide Concretions
Quartzose Sandstone with Limonite/Hematite
sedimentary
Hematitic Sandstone
Sandstone with Hematite inclusions (SiO2 + Fe2O3)
sedimentary
Weathered quartz-rich cobble (probable quartzite or silicified rock)
Quartzite, predominantly SiO₂; exact identification is uncertain from the photograph
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chalcedony Pebble / Rough Agate
Silicon Dioxide (SiO2)
mineral
Ferruginous Sandstone
Arenite with Iron-Oxide cement (Fe2O3 · nH2O)
sedimentary
Aura Quartz Bead
Silicon dioxide (SiO2) with metal coating
mineral with artificial coating
Quartzite (Iron-stained)
Quartzite (SiO2 with iron oxides)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite River Rock
Quartzite (SiO2)
metamorphic
Orange Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite
Silicon Dioxide (SiO2)
metamorphic
Quartz Pebble (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with Hematite/Limonite inclusion
mineral
Ferruginous Quartz
Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Weathered Quartzite or Chert Pebble
Silicon Dioxide (SiO2)
metamorphic or sedimentary
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
mineral
Quartzite with Iron Staining
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 trace)
metamorphic
Chrysocolla on Matrix
Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)
mineral
Sandstone (Ferruginous)
Arenite with iron oxide cement (Fe2O3)
sedimentary
Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral