Epidote (Unakite component) / Green Quartzite
Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Category
Mineral, Often Found In Sedimentary Deposits
Browse mineral, often found in sedimentary deposits specimens identified by the Rock Identifier community.
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Fossilized bone, likely a tooth or jaw fragment
Mineralized vertebrate bone; taxonomic identification requires clearer diagnostic anatomy
fossil
Satin Spar (often sold as Selenite)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartz Geode Fragment
Crystalline Silicon Dioxide (SiO2)
mineral
Shale
Shale (Lutite)
sedimentary
Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Carnelian (Banded Agate)
Chalcedony (SiO2) with Iron Oxide inclusions
mineral
Turtle Stone / Septarian Nodule (Fragment)
Septarian Concretion (Calcite, Aragonite, and Limestone)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Grey Chalcedony
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Red Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert or Flint
Silicon dioxide (SiO2)
sedimentary
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
sedimentary
Fossilized Echinoid
Echinoidea
fossil
Yellow Jade (often Serpentine or Dolomite)
Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.
Mineral, often a rock given its aggregate nature
Quartz pebble
Silicon dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Banded Sandstone
Arenite (with iron oxide banding)
sedimentary
Epidote with Magnetite/Hematite inclusions
Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides
mineral
Amber
Amber (C10H16O)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Chalcedony / Agate with Botryoidal Quartz
Silicon Dioxide (SiO2)
sedimentary
Copper-bearing Quartz (likely Malachite on Quartz matrix)
Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)
mineral
Sandstone / Weathered Chert
Silicon Dioxide (SiO2) / Quartz-rich Clastic Rock
sedimentary
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Rough Green Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Peacock Ore (Chalcopyrite)
Chalcopyrite (CuFeS2)
mineral
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Galena (lead sulfide)
Galena, PbS
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Celestite (Celectine)
Strontium sulfate (SrSO4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral