Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Category
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Chert (and Flint variant)
Microcrystalline Quartz (SiO2)
Quartz (on matrix)
Quartz (Silicon Dioxide, SiO₂)
Zebra Jasper
Silicon dioxide (SiO2) with various impurities
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
Chert
Chert (variant of microcrystalline quartz)
Rough Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
Smoky Quartz
Silicon Dioxide (SiO2)
Chert (Nodule / Geode fragment)
Microcrystalline Quartz (SiO2)
Muscovite Mica
Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))
Crushed Limestone
Calcite-rich Sedimentary Rock (CaCO3)
Chert (and/or River Pebble)
Microcrystalline silica (SiO2)
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
Chert (specifically Banded Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (River Pebble)
Microcrystalline silicon dioxide (SiO2)
Moqui Marble (Shaman Stone)
Ironstone Concretion (Fe2O3) - primarily Hematite or Goethite shell with Sandstone core
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
Chert (specifically Jasper/Flint)
Microcrystalline Quartz (SiO2)
Chert (Flint Nodular Variety)
Microcrystalline Quartz (SiO2)
Wonderstone (Banded Rhyolite)
Rhyolite (Silicon Dioxide with Iron Oxide impurities)
Crinaudite / Fossilized Crinoid Stem
Crinoid (Echinodermata) in a Calcitic/Siliceous Matrix
Chert Pebble/Nodule
Chert (a microcrystalline or cryptocrystalline sedimentary form of quartz, SiO2)
Chert (Nodular Chert)
Microcrystalline Silica (SiO2)
Shale
Shale (Lutite)
Shale (possibly)
Shale (fine-grained clastic sedimentary rock)
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Jasper and Quartzite Pebble
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Jasper)
Chert / Microcrystalline Quartz (SiO2)
Shale
Fissile Siliciclastic Sedimentary Rock
Chert (Chert / Flint)
Silicon dioxide (SiO2) - Microcrystalline quartz
Chert (Quartz Variety)
Chert (mostly SiO2 / Silicon Dioxide)
Conglomerate
Conglomerate (a clastic sedimentary rock)
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
Man-made Synthetic Material (Costume Faux Fur)
Synthetic Polymer (Polyester/Acrylic)
Caliche (with Lichen Cover)
Calcium carbonate-cemented soil layer (CaCO3)
Chert (varieties include Flint or Jasper)
Chert (cryptocrystalline quartz; SiO₂)
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
Chert (Jasper and Chalcedony)
Silicon Dioxide (SiO2)
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Quartz (likely Clear Quartz or Rock Crystal)
Quartz (SiO2)
Chert (also known as Flint or Common Chalcedony)
Cryptocrystalline Silica (SiO2)