Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Not A Rock (Synthetic Material)
Browse not a rock (synthetic material) specimens identified by the Rock Identifier community.
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Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Septarian Nodule (Dragon Stone)
Septarian Concretion (CaCO3 with Calcite, Aragonite, and Limestone/Bentonite)
sedimentary
Sandstone
Arenite
sedimentary
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
sedimentary
Limonite (Iron Ore)
Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)
mineral
Porphyritic rhyolite (likely lithophysal/vesicular rhyolite)
Rhyolite; chiefly quartz and alkali feldspar, with minor plagioclase and iron-bearing minerals
igneous
Chert (Commonly called Jasper or Flint)
Chert (SiO2)
sedimentary
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Granite (with Quartz fragment)
Intrusive Felsic Igneous Rock
igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Granite
Intrusive Felsic Igneous Rock
igneous
Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Granite Pebble
Granite (Felsic Plutonic Rock)
igneous
Sandstone or Mudstone
Sedimentary Rock (Sandstone/Mudstone)
sedimentary
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Mineral within a Sedimentary Rock
Red Sandstone
Quartzose Sandstone (primarily quartz grains cemented by iron oxides)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
sedimentary
Schist
N/A (a rock type, not a mineral formula)
metamorphic
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (specifically Jasper or Brown Chert node)
Microcrystalline Quartz (SiO2)
sedimentary
Chert Nodules / Flint
Crystalline Silica (SiO2)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)
sedimentary
Banded calcite (likely marble or calcite-rich limestone)
Calcite, CaCO₃; possibly calcitic marble
metamorphic
Shark Tooth Fossil
Vertebrate fossilized tooth
fossil
Quartz
Silicon Dioxide (SiO2)
mineral
Scoria (Lava Rock)
Scoria (Vesicular Basaltic Glass/Rock)
igneous
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Sandstone
Arenite (primarily Quartz Arenite)
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite/Quartz Arenite
sedimentary
Basalt
Aphanitic basaltic rock
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Quartzite
SiO2 (Metamorphosed Sandstone)
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Sandstone (Pebble / Cobble)
Arenite / Sedimentary Rock (composed of quartz and feldspar)
sedimentary
Polygenetic Breccia
Clastic Breccia (containing lithic fragments in a fine-grained matrix)
sedimentary