Sandstone (likely Ferruginous)
Sandstone (SiO2 with iron oxides)
sedimentary
Category
Mineral Based Composite
Browse mineral based composite specimens identified by the Rock Identifier community.
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Tumbled Stone Collection (Fluorite, Sodalite, Moss Agate, Amethyst/Charoite, and Grey Agate)
Silica (SiO2) and Calcium Fluoride (CaF2) based minerals
mineral
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Geode half
Geode (often quartz/chalcedony based)
sedimentary or igneous
Red Sandstone
Arenite (predominantly Quartz with Hematite cementation)
sedimentary
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Smoky Quartz Cluster
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Mineral
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)
sedimentary
Sandstone (likely Graywacke or Siltstone variety)
Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)
sedimentary
Red Sandstone
Arenite (primarily SiO2 with Fe2O3)
sedimentary
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Aragonite (specifically Mexican Marbled Onyx)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Rhodonite Tumbled Chips
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Sandstone
Arenite
sedimentary
Sedimentary Breccia
Clastic Breccia (CaCO3/SiO2 matrix)
sedimentary
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Unknown Organic Object (likely a berry or fruit)
Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.
Organic Material (likely a fruit or berry)
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Plume Agate or Moss Agate
Agate (SiO2)
mineral
Amethyst
Silicon Dioxide with iron impurities (SiO2)
mineral
Red Garnet
Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)
Mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
N/A (The provided image is a storyboard/digital document)
N/A
Tourmalinated Quartz
Quartz (SiO2) with included Tourmaline (complex borosilicate)
Mineral composite
Sandstone
Sandstone (Silicon dioxide, SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based clastic rock)
sedimentary
Amber in Matrix
Succinite (Carbon-based organic polymer)
Organic (Sedimentary context)
Sandstone (with banding/weathering)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Jasper (likely a variety of Yellow or Mustard Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary (chemically precipitated mineral)
Tumbled Stones (various)
Mixed Silica-based Minerals (primarily Quartz and Chalcedony)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Sandstone (Arkose/Quartzose)
Arenite (SiO2 based clastic rock)
sedimentary
Sandstone
Arenite (SiO2 based sedimentary rock)
sedimentary
Sandstone
Arenite (Silicon Dioxide, SiO2 based)
sedimentary
Tiger Iron
Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)
metamorphic
Gold
Gold (Au)
mineral
Gold
Native Gold (Au)
mineral