Glauconitic Sandstone
Glauconitic Sandstone (complex silicate formula: (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Category
Mineral Like Byproduct
Browse mineral like byproduct specimens identified by the Rock Identifier community.
Conglomerate
Conglomerate
Sedimentary
Botryoidal Chalcedony (Agate/Desert Rose Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Black Tourmaline in Quartz
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) in Silicon Dioxide (SiO2)
igneous
Ruby in Zoisite (Anyolite)
Corundum var. Ruby in Zoisite (Al2O3 + (Ca2Al3(SiO4)3(OH)))
metamorphic
Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)
sedimentary
Sandstone (Quartz-rich)
Sandstone (SiO2 dominated)
sedimentary
Flagstone (Sandstone)
Clastic Sedimentary Rock (composed of quartz and feldspar)
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)
Phylum Echinodermata, Class Echinoidea
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Quartz (Microcrystalline/Macro crystalline variety)
Silicon Dioxide (SiO2)
mineral
Unakite
Unakite (Metasomatized Granite)
metamorphic
Halite
Halite (NaCl)
Mineral
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities
sedimentary
Agate
Silicon Dioxide (SiO2) - variety: Chalcedony
mineral
Banded Agate (specifically Botswana Agate appearance)
Silicon Dioxide (SiO2)
mineral
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Quartz (Raw Chunk)
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Chert / Chalcedony
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
sedimentary
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Blue Quartzite
Blue Quartzite (Primary mineral: Quartz, SiO2 with magnesio-riebeckite or crocidolite inclusions)
metamorphic
Basalt with Quartz/Calcite Veins
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Fossilized Coral (Petoskey Stone type)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Ironstone Nodule (Ironstone Concretion)
Siderite-rich Mudstone (FeCO3) or Limonite (FeO(OH)·nH2O)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay impurities
sedimentary
Chert (variant Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
White Topaz
Topaz - Al2SiO4(F,OH)2
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartzite (specifically Milky Quartz variety)
Quartz (SiO2)
metamorphic
Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Obsidian
Obsidian (principally SiO2 with MgO and Fe3O4)
igneous
Sandstone (likely Arkose)
Arenite (composed mainly of SiO2 with Feldspar)
sedimentary
Green glass sphere/marble
Soda-lime glass (primarily SiO2, Na2O, CaO)
Man-made object (Simulant)
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral