Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Category
Industrial Byproduct (Often Mistaken For Obsidian Or Mineral)
Browse industrial byproduct (often mistaken for obsidian or mineral) specimens identified by the Rock Identifier community.
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Snowflake Obsidian
Volcanic Glass (SiO2 rich with Cristobalite inclusions)
igneous
Ironstone Concretion (Limonite/Hematite Nodules)
Ironstone (principally Limonite FeO(OH)·nH2O or Hematite Fe2O3 mixed with silica/clay)
sedimentary
Obsidian
Obsidian (Volcanic Glass)
igneous
Obsidian
Volcanic glass (primary composition: SiO2)
igneous
Obsidian (specifically Mahogany Obsidian)
Volcanic glass (high silica content, SiO2)
igneous
Green Quartzite / Aventurine
Quartzite (SiO2 with fuchsite/chlorite inclusions)
metamorphic
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
sedimentary
Goldstone
Aventurine Glass (Man-made)
mineral
Muscovite Schist
Muscovite Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Mica Schist (with Muscovite mica)
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Obsidian
Obsidian (Volcanic Glass)
igneous
Chalcopyrite in River Pebble (Pebble with Pyrite/Fool's Gold inclusions)
CuFeS2 in fine-grained igneous host rock (Basalt / Andesite)
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Black Obsidian
Volcanic Glass (Amorphous SiO2 with trace impurities)
igneous
Chert Concretion
Sedimentary Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Quartzite or Yellow Jasper
Quartzite (primarily SiO2 with Iron oxide staining)
metamorphic
Ironstone (Limonite/Hematite concretion)
Ferruginous Siltstone / Goethite (FeO(OH))
sedimentary
Apache Tear
Hydrated Obsidian (Volcanic Glass)
Igneous
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Orange Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Ironstone Concretion
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Ironstone Concretion (Coprolite-like)
Goethite/Hematite Siderite Spheroid (FeCO3 or FeO(OH))
sedimentary
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
Mineral in a Metamorphic/Hydrothermal rock
Iron-stained Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Pyrite on Limestone
Iron Disulfide (FeS2) in Calcium Carbonate (CaCO3) matrix
sedimentary (matrix) / mineral (inclusion)
Goldstone and pink quartz bead strands
Goldstone is aventurescent copper-bearing glass; pink beads are likely rose quartz (SiO₂), though dyed or glass imitations are possible
mineral
Basalt
Basalt
Igneous
Siltstone
Siltstone (primarily SiO2 with Al2O3)
sedimentary
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Black Star Diopside (beads)
Diopside (CaMgSi2O6) - a member of the pyroxene group
Mineral
Quartzite (Iron-stained)
Quartzite (mostly SiO2 with Fe2O3 impurities)
metamorphic
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Fossilized Brachiopod
Brachiopoda (Phylum)
fossil
Fossilized Shark Tooth (Drum Fish Tooth/Pavement Tooth)
Sparidae or Sciaenidae (Crushing plate dental fossil)
fossil
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral