Diorite
Diorite (Intermediate intrusive igneous rock)
Category
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
Diorite
Diorite (Intermediate intrusive igneous rock)
Basalt
Extrusive Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)
Sandstone with Iron Staining
Arenite (SiO2 with Fe-oxide coatings)
Green aventurine quartz (probable)
Quartz, silicon dioxide (SiO₂), with disseminated green mica/fuchsite inclusions
Sandstone (likely Iron-rich or Arkosic)
Arenite (SiO2 with FeO(OH) or Fe2O3 staining)
Chert Nodules / Flint
Crystalline Silica (SiO2)
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
Chert (White Chert/Flint)
Silicon Dioxide (SiO2)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Conglomerate
Conglomerate (Clastic sedimentary rock)
Quartz Pebble (with probable inclusions or staining)
Quartz (Silicon Dioxide - SiO2)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Banded Siltstone
Banded Siltstone / Laminated Siltstone
Sandstone with Iron Weathering
Quartz Arenite / Weathered Sandstone
Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)
Sandstone (Weathered)
Arenite (typically SiO2 as quartz grains)
Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
Granite Gneiss
Gneiss (High-grade metamorphic rock)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Sandstone (mainly SiO2 with Fe2O3 staining)
Chrysocolla in Jasper (Chryso-Jasper)
Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)
Chert / Flint (Yellow Jasper Variant)
Microcrystalline Quartz (SiO2 with Iron Oxide impurities)
Chert (often called Flint or Jasper)
Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)
Milky Quartz/Clear Quartz Cluster
Silicon Dioxide (SiO2)
Chalcedony (Agate/Carnelian variety)
Cryptocrystalline Quartz (SiO2)
Blue Quartzite (Dyed)
Metamorphosed Quartz-rich Sandstone (SiO2 with organic dye)
Granite
Granite
Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Quartzite
Quartzite (primarily SiO2)
Cubic Zirconia
Zirconium Dioxide (ZrO2)
Diamond in Kimberlite
Diamond (C in Kimberlite Matrix)
Gneissic Schist
Foliated Metamorphic Rock (Schist/Gneiss transition)
Pumice
Pumice (Volcanic Rock)
Quartzite
Quartzite (mostly SiO2)
Quartzite
Quartzite (SiO2)
Chert (River Pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Conglomerate
Conglomerate (clastic sedimentary rock)
Ocean Jasper
Orbicular Jasper / Chalcedony (SiO2)
Limonite (Bog Iron)
Limonite (Hydrated iron(III) oxide-hydroxide) - FeO(OH)·nH2O
Garnet Gneiss
Gneiss containing almandine-pyrope garnet