Iron Slag
Iron Slag (Industrial Vitreous Material)
Mineral/By-product
Category
Organic Gem Material (Botanical)
Browse organic gem material (botanical) specimens identified by the Rock Identifier community.
Learn about Organic Gem Material (Botanical) in the encyclopedia
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Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Siltstone Pebble
Siltstone (primarily SiO2 with Al2O3)
sedimentary
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Jasper (Green Jasper/River Stone)
Silicon Dioxide (SiO2) with impurities
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - variety Jasper
sedimentary
Sandstone
Arenite (mainly SiO2 with varying cements)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (with Chert/Quartzite)
Arenite (SiO2 primarily)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Ammonite Fossil
Ammonoidea (primarily composed of Calcite, CaCO3)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Glacial Erratic (Sandstone/Quartzite)
Glacial Erratic specimen (likely Orthoquartzite or Feldspathic Sandstone)
sedimentary or metamorphic
Sandstone (Quartzite-rich)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Fire Opal (in Matrix)
Hydrated Silica (SiO2·nH2O)
mineral
Sandstone (lithic wacke/conglomerate mix)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone with Manganese Dendrites
Arenite (mostly SiO2) with Manganese Oxide inclusions (MnO2)
sedimentary
Siltstone Pebble
Siltstone
sedimentary
Marble (polished)
Recrystallized Calcite (CaCO3)
metamorphic
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Geode with Quartz/Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Amazonite
Microcline (KAlSi3O8) with trace lead (Pb)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Black Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Sandstone
Arenite (primarily SiO2 with various cementing agents)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Red Sandstone
Arenite (Fe2O3 enriched)
sedimentary
Botryoidal Chalcedony (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Sandstone
Clastic Sedimentary Rock (composed mostly of quartz, SiO2)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Sandstone (Beach Pebble)
Clastic sedimentary rock (primarily Quartz and Feldspar)
sedimentary