Galena
Lead(II) sulfide (PbS)
mineral
Category
Sedimentary (With Some Aspects Of Mineral Replacement)
Browse sedimentary (with some aspects of mineral replacement) specimens identified by the Rock Identifier community.
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Green Jasper / Chert
Microcrystalline Quartz (SiO2)
sedimentary
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Yellow Chalcedony
Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Chalcedony (Common Opal variant)
Silicon dioxide (SiO2) with varying levels of hydration
mineral
Brachiopod Fossil
Phylum Brachiopoda
fossil
Pyrite
Iron Sulfide (FeS2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
gemstone
Chalcedony on Matrix
Silicon Dioxide (SiO2)
mineral
Chert (Limestone-based)
Silicon Dioxide (SiO2)
sedimentary
Gneissic River Cobble
Gneiss
metamorphic
Fossilized Sea Urchin (Echinoid)
Echinoidea (Class) - likely replaced by Calcite or Quartz
sedimentary
Galena
Lead(II) sulfide (PbS)
mineral
Jasper
Silicon dioxide (SiO2)
Mineral / Sedimentary
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Chalcedony (Milky Agate/Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite-rich Ore
Pyrite (FeS2) with secondary minerals
mineral
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
fossil
Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
sedimentary
Goethite/Hematite Nodule
Goethite (FeO(OH)) and Hematite (Fe2O3)
mineral
Flint (Chert Flake / Drill Tool)
SiO2 (Microcrystalline Quartz)
sedimentary
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
mineral
Fossilized Shark Tooth
Elasmobranchii (Class) fossil
fossil
Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).
Galena (PbS)
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Bivalve Fossil
Bivalvia (Phylum Mollusca)
Fossil
Chert / Chalcedony Blend
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodular)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Shell
Phylum Mollusca (Gastropod fossil)
fossil
Agated Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert Nodules
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite with Galena and Sphalerite on Matrix
Iron Sulfide (FeS2), Lead Sulfide (PbS), Zinc Sulfide (ZnS)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Chert (with potential fossil inclusion)
Microcrystalline Quartz (SiO2)
sedimentary