Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Category
Mineral Or Sedimentary Rock (With Mineral Inclusions)
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
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Biotite-rich gneiss
Foliated quartz–feldspar–mica gneiss; mainly quartz, plagioclase/alkali feldspar, and biotite
metamorphic
Polished banded gneiss pebble
Gneiss, commonly quartz–feldspar–biotite gneiss
metamorphic
Red Sandstone
Arenite (primarily quartz with iron oxide cement)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartzwacke / Impure Sandstone
Arenite with minor lithic fragments (Silicon Dioxide matrix)
sedimentary
Green Quartz (Prasiolite/Adventurine)
Silicon Dioxide with inclusions (SiO2)
mineral
Quartz Vein in Hematitic Siltstone
Hydrothermal Quartz (SiO2) in Ferriferous Matrix
metamorphic
Jasper with Quartz
Silicon dioxide (SiO2)
mineral
Sandstone Pebble
Sandstone (primarily SiO2)
sedimentary
Rounded iron-rich pebble
Likely ironstone or ferruginous quartzite; exact identification requires testing
metamorphic
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
mineral
Blue Impression Jasper beads
Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions
gemstone
Sandstone with Quarzite clasts
Arenite (SiO2 based)
sedimentary
Quartz fragment (Pebble)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 with various cementing minerals)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in a Geode body
sedimentary or igneous (host environment)
Poppy Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Banded gneiss (likely orthogneiss or paragneiss)
Gneiss; composition commonly quartz + feldspar + mica, with possible amphibole/biotite
metamorphic
Sandstone with Vitrinite/Coal inclusions
Arenite with Carbonaceous inclusions
sedimentary
Polished brecciated jasper
Microcrystalline quartz (SiO₂), commonly colored by iron oxides
mineral
Sandstone (with Iron Staining)
Arenite
sedimentary
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone with Dendritic Inclusions
Quartzose Sandstone
sedimentary
Gneiss
Banded orthogneiss or paragneiss, typically quartz–feldspar–mica bearing
metamorphic
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Basalt with Xenolith
Extrusive Igneous Rock containing Mantle Xenolith
igneous
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
mineral
Sandstone
Arenite (SiO2 dominant)
sedimentary
Green calcite-bearing rock (likely calcite on a pale matrix)
Calcite, CaCO₃; exact matrix and green coloring cannot be determined from the image
mineral
Sandstone
Arenite
sedimentary
Sandstone pebble
Sandstone (mainly Quartz, SiO2)
sedimentary
Gossanous Sandstone (likely Terrestrial)
Arenite with Iron-Oxide inclusions
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Banded Jasper
Silicon Dioxide with Iron Oxide impurities (SiO2)
sedimentary
Sandstone (likely Graywacke or Lithic Sandstone)
Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite
sedimentary