Fossilized Shark Tooth
Carcharocles or Otodus sp. (Micro-fossilized)
sedimentary
Category
Organic (Sedimentary Associated)
Browse organic (sedimentary associated) specimens identified by the Rock Identifier community.
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Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Chert (Jasper)
Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Common Opal variant)
Silicon dioxide (SiO2) with varying levels of hydration
mineral
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Carnelian / Chalcedony
Silicon Dioxide (SiO2)
mineral
Galena
Lead Sulfide (PbS)
mineral
Pyrite in Host Rock
Iron Disulfide (FeS2)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Zebra Jasper
Tektite variety of Silicon Dioxide (SiO2) with inclusions
sedimentary
Kyanite (Blue Kyanite)
Kyanite (Al2SiO5)
mineral
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Pyrite in Quartz
Iron Disulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Pyrite (locally known as Fool's Gold)
Iron Sulfide (FeS2)
mineral
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Gold Mineral
Native Gold (Au)
mineral
Chert (Siltstone-Chert mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Limestone
Sedimentary Rock (Primarily CaCO3)
sedimentary
Limestone with Fossil Fragments
Bioclastic Carbonate Rock (CaCO3)
sedimentary
Chert (Flint Nodule)
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Organic Diamond/Gemstone (often associated with Sedimentary sequences)
Ferruginous Sandstone with Concretion
Sandstone (SiO2 dominated with Fe2O3 cement)
sedimentary
Sedimentary Rock (Limestone or Siltstone pebble)
Sedimentary rock fragment
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Marble
Metamorphic carbonate rock (primarily recrystallized calcite, CaCO3)
metamorphic
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
mineral
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Emerald
Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium
mineral