Sandstone Concretion
Sedimentary Clastic Rock (Silicate-rich)
Category
Browse mineral with metamorphic or sedimentary host specimens identified by the Rock Identifier community.
Sandstone Concretion
Sedimentary Clastic Rock (Silicate-rich)
Shatter Cone
Impactite (Shatter Cone texture)
Vein-filled Sedimentary Rock
Silicified sedimentary rock with quartz/calcite vein
Fuchsite on Quartz
Muscovite (KAl2(AlSi3O10)(OH)2) with Chromium impurities
Schist
Schist (primarily mica-schist)
Quartz Geode
Silicon Dioxide (SiO2)
Quartz Veined Siltstone
Siltstone with Quartz Intrusion (SiO2)
Dyed Quartz Geode
Silicon Dioxide (SiO2) with artificial purple dye
Quartz Geode
Crystalline Quartz (SiO2) within a sedimentary or volcanic host
Peacock Ore (Bornite or Iridescent Chalcopyrite)
Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with oxidation
Quartz-rich granitic pegmatite fragment
Pegmatite, composed mainly of quartz (SiO₂), feldspar, and mica
Gold-bearing Quartz
Auriferous Quartz (SiO2 with Native Gold inclusion)
Titanium Quartz (Aura Quartz)
Silicon Dioxide (SiO2) treated with Titanium
Agate (within host rock)
Agate (Quartz variety SiO2)
Amethyst (Quartz)
Silicon Dioxide (SiO2) with Iron impurities
Siltstone Concretion
Carbonate-cemented Siltstone Concretion
Green Fluorite
Calcium Fluoride (CaF2)
Turquoise
CuAl6(PO4)4(OH)8·4H2O
Schist
Schist (metamorphic rock)
Quartz-veined Sedimentary Rock
Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)
Quartz Geode Fragment
Silicon Dioxide (SiO2) in a Sedimentary Host
Pyrite (on Shale/Matrix)
Iron Disulfide (FeS2)
Quartz Veined Jasper
Microcrystalline quartz (SiO2) with calcium carbonate or quartz veins
Magnetite-rich ironstone (probable magnetite ore)
Magnetite, Fe₃O₄, likely in a fine-grained ironstone matrix
Quartz-veined Sandstone
Quartzite-veined Arenite / SiO2 and quartz sand
Ironstone Nodules (Iron Concretion)
Siderite or Hematite Concretion
Milky quartz vein fragment
Quartz, silicon dioxide (SiO₂)
Druzy Quartz on Matrix
Silicon Dioxide (SiO2)
Druzy Quartz on Limestone
Silicon Dioxide (SiO2)
Shale
Fissile Mudstone
Gold Ore in Quartz
Native Gold (Au) in Quartz (SiO2)
Milky quartz (likely quartz-rich vein fragment)
Quartz, silicon dioxide (SiO₂)
Milky quartz (quartz-rich rock fragment)
Quartz, silicon dioxide (SiO₂)
Quartz Vein in Metamorphic Rock
Quartzite or Schist host with Quartz (SiO2) intrusion
Sandstone with Quartz Vein
Arenite with Crystalline Silica (SiO2)
Chalcedony (Common Agate)
Cryptocrystalline Quartz (SiO2)
Gossan (with secondary copper minerals)
Iron-rich oxidized rock cap (Limonite/Goethite with Malachite/Chrysocolla inclusions)
Ruby (in jewelry)
Corundum (Al2O3 with Chromium traces)
Zebra Jasper
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
Ruby (Cabochon)
Corundum (Al2O3)
Banded Agate
Silicon Dioxide (SiO2) - Chalcedony variety
Milky Quartz (with Iron staining)
Silicon Dioxide (SiO2)