Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
Category
Browse mineral on sedimentary specimens identified by the Rock Identifier community.
Fluorite (likely Green Fluorite variant)
Calcium Fluoride (CaF2)
Ammonite Fossil
Ammonoidea (Calcium carbonate - CaCO3)
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula: SiO2)
Jasper
Cryptocrystalline Quartz (SiO2)
Banded Chert (or Banded Jasper)
Silicon Dioxide (SiO2) with Iron Oxide impurities (Hematite/Goethite)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Greywacke (River Pebble)
Greywacke sandstone with quartz veining
Ironstone (likely siderite or goethite-rich siltstone)
Ferruginous Siltstone
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Shiva Lingam
Cryptocrystalline Quartz (Jasproid/Jasper)
Ferruginous Sandstone (Gozzan-like)
Ferruginous Sandstone (SiO2 with FeO(OH) inclusions)
Ferruginous Breccia
Breccia with Iron-rich (Hematite/Goethite) Matrix
Sandstone (Pebble)
Sandstone (arenite, arkose, wacke depending on composition)
Quartz (Milky/Clear)
Silicon Dioxide (SiO2)
Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
Dalmatian Stone
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Gneiss (specifically a water-worn pebble)
Gneiss
Yellow Jasper
Silicon Dioxide (SiO2)
Quartz Geode
Quartz (Silicon Dioxide - SiO2) within a Chalcedony and Limonite shell
Orange Calcite
Calcite (Calcium Carbonate - CaCO3)
Chert (Jasper/Agate variety)
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Amber
Succinite (Fossilized Resin)
Chert (Iron-stained)
Chert (Silicon Dioxide, SiO2)
Chert (Flint)
Chert (SiO2)
Orbicular Jasper (Ocean Jasper or Poppy Jasper variant)
Silicon Dioxide (SiO2) with various inclusions
Almandine Garnet in Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
Bauxite
Alumina-rich rock (consisting of Gibbsite, Boehmite, and Diaspore)
Quartz-veined Mudstone or Argillite
SiO2 (Quartz) in Siltstone/Mudstone matrix
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Bauxite
Hydrated Aluminum Oxides (primarily Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))
Blue Chalcedony
Silicon Dioxide (SiO2)
Jasper (specifically Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with iron oxide and other mineral impurities
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
River Siltstone / Mudstone Pebble
Siltstone (composed of mixed silicate and carbonate minerals)
Orbicular Rhyolite (Rainforest Jasper)
Rhyolite containing Spherulites (SiO2 with impurities)
Calcite on Limestone (or Fossil)
Calcium Carbonate (CaCO3)
Chert (Flint)
Silicon dioxide (SiO2)
Chert (variations include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Chert (specifically Jasper or Flint variant)
Cryptocrystalline Quartz (SiO2)