Opalite
Synthetic Glass (Amorphized Silicon Dioxide)
mineraloid
Category
Industrial By Product
Browse industrial by product specimens identified by the Rock Identifier community.
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Kyanite
Kyanite (Al2SiO5)
Mineral
Pumice
Pumice (volcanic glass)
igneous
Pumice
Pumice (Vesicular volcanic glass)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Mineral
Native Sulfur
Sulfur (S)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Pumice
Pumice (volcanic glass foam)
igneous
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Pumice
Pumice (Vesicular Rhyolite/Andesite)
igneous
Quartzite Pebble
Metamorphic Quartz (SiO2)
metamorphic
Pumice
Pumice (a highly vesicular volcanic glass)
igneous
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Sandstone (lithic wacke/conglomerate mix)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
sedimentary
Seraphinite
Clinochlore (Mg,Fe2+)5Al(Si3Al)O10(OH)8
mineral
Sulfur
Native Sulfur (S)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Stichtite (often found in Serpentinite)
Stichtite Mg6Cr2CO3(OH)16·4H2O
Mineral
Hematite / Goethite (Iron Ore)
Iron Oxide (Fe2O3 / FeO(OH))
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Sea Glass (often mistaken for Gemstones)
Amorphous Silica (SiO2) with trace additives
mineraloid
Quartzite
Quartzite (mostly SiO2)
metamorphic
Turquoise and Hematite
Turquoise: CuAl6(PO4)4(OH)8·4H2O; Hematite: Fe2O3
mineral
Limonite/Goethite on Shale
Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock
sedimentary
Specular Hematite
Specularite (Iron Oxide, Fe2O3)
mineral
Sandstone (likely Fossiliferous Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Hematite
Ferric Oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Red Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Limonite (Iron-rich Gossan/Laterite)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Pumice (Volcanic Rock)
Vesicular volcanic rock (composed largely of amorphous volcanic glass)
igneous
Pumice
Pumice (a highly vesicular volcanic rock)
igneous
Pumice
Pumice (a highly vesicular felsic volcanic rock)
igneous
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Pumice
Pumice (a highly vesicular volcanic glass)
igneous
Yellow Aventurine (Yellow Quartz)
Silicon Dioxide (SiO2) with inclusions of Muscovite or Mica
Mineral (variant of Quartz)
Coal (likely Anthracite)
Anthracite coal
sedimentary