Quartz with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
mineral
Category
Mineral Like Industrial Smelting Waste
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Anthracite Coal
Anthracite (Carbon Content: 86%-97%)
metamorphic
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
metamorphic
Geode (unopened) or Calcareous Nodule
Siliceous or Calcareous Concretion/Nodule
sedimentary
Quartz with inclusions (likely Tourmaline or Biotite)
Silicon Dioxide (SiO2)
mineral
Opalite
Synthetic Fluorescent Glass (SiO2 + impurities)
mineraloid (synthetic)
Blue Dumortierite Quartz
AlAl6BSi3O18 (Dumortierite) within SiO2 (Quartz)
mineral
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Banded Flint (Polished Stripe Flint)
Silicon Dioxide (SiO2) - variety of Chert
sedimentary
Astrophyllite
Astrophyllite (K2NaFe7Ti2Si8O26(OH)4F)
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with inclusions of Titanium Dioxide (TiO2)
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Chert (or possibly Flint)
SiO2 (Silicon Dioxide)
Sedimentary Rock
Obsidian
Volcanic Glass (SiO2)
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gastly (Trick or Trade Halloween Series)
Cellulose-carbonaceous composite (Lignocellulose laminated with pigmentary polymers)
Mineral (Synthetic - Paper and Ink Polymorph)
Aragonite (Botryoidal/Coralloidal variety)
Aragonite (CaCO3)
mineral
Black Tourmaline
Schorl (Sodium iron aluminum borosilicate), NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide - SiO2)
Mineral
Diamond (in a gold ring setting)
Carbon (C)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Vesicular Basalt
Amygdaloidal Basalt (Mafic extrusive volcanic rock)
Igneous
Sandstone
Arenite
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Quartz
Quartz (SiO₂)
Mineral
Basalt
Mafic Volcanic Rock (primarily Plagioclase and Pyroxene)
Igneous
Shiva Lingam
Cryptocrystalline Quartz (Jasproid/Jasper)
sedimentary
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Mineral (or mineraloid if microcrystalline)
Mahogany Obsidian
Volcanic glass (high silica) with inclusions of Magnetite or Hematite
igneous
Granitic Gneiss
Gneiss (Complex silicate composition)
metamorphic
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide mixture)
mineral
Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph
sedimentary
Proustite
Proustite (Ag3AsS3)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Serpentine
Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)
metamorphic
Obsidian (specifically Mahogany Obsidian)
Volcanic glass (high silica content, SiO2)
igneous
Quartz with Mica/Host Rock
Silicon Dioxide (SiO2) with Phyllosilicates
mineral