Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (composed primarily of Fluorapatite)
mineral
Category
Mineral (Silicate Replaced Organic Material)
Browse mineral (silicate replaced organic material) specimens identified by the Rock Identifier community.
Learn about Mineral (Silicate Replaced Organic Material) in the encyclopedia
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Slag Glass
Vitreous Silicate Residue
industrial byproduct (anthropogenic rock)
Amber
Resinite / Fossilized Tree Resin
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)
metamorphic
Goethite pseudomorph after Pyrite
Goethite (FeO(OH)) pseudomorph after Pyrite (FeS2)
mineral
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO₂)
sedimentary
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Travertine
Calcareous tufa (CaCO3)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Brown Variety)
Microcrystalline quartz (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Chrysocolla in Malachite
Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)
mineral
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
mineral
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Travertine (often colloquially called Tufa)
Chemical Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)
sedimentary
Jasper (likely Brown or Brecciated)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Tiger's Eye
Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2
Mineral
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (often called Flint when dark or worked)
Cryptocrystalline silica (SiO2)
sedimentary
Chert (often called Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (variations include Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Chert Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Yellow Jasper/Flint)
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Tiger's Eye
Silicified Riebeckite Asbestos (SiO2 with Iron Oxide inclusions)
mineral
Chert (and/or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
mineral
Chert (specifically Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary