Fossilized Shark Tooth (Basal Bone)
Otodus sp. (Mineralized Hydroxyapatite)
sedimentary
Category
Organic Gemstone (Often Associated With Sedimentary Sequences)
Browse organic gemstone (often associated with sedimentary sequences) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Often Associated With Sedimentary Sequences) in the encyclopedia
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Blue Kyanite in Schist
Al2SiO5 in Mica Schist
metamorphic
Blue Lace Agate
Silicon Dioxide (SiO2) - Chalcedony / Quartz
sedimentary
Amber
Succiniferous fossil resin (C10H16O)
mineraloid
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (variations include Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Picture Jasper (specifically Biggs or Deschutes variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Jasper
Silicon Dioxide (SiO2), Microcrystalline Quartz
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
sedimentary
Green Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Amber (in Matrix/Shale)
Amber (Fossilized Tree Resin)
mineral
Chert
Microcrystalline quartz (SiO2)
sedimentary
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Jasper
Microcrystalline Quartz (SiO2)
gemstone
Pyrite-bearing Schist
Pyritic Quartz-Mica Schist with FeS2 inclusion
metamorphic
Green Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Serpentinite
Serpentinite (Hydrated magnesium iron phyllosilicate)
metamorphic
Chert (Green Chert/Jasper)
Chert (primarily Microcrystalline Quartz, SiO2)
sedimentary
Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Tufa (Calcareous Tufa)
Calcareous Tufa (CaCO3)
sedimentary
Chert (Jasper/Common Opal transition)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Matrix Rhodonite
Inosilicate (Manganese Inosilicate, (Mn,Fe,Mg,Ca)SiO3) with Quartz and Pyrite matrix
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Biotite Schist
Biotite-rich Schist
metamorphic
Black Opal (Kalimaya)
Hydrated Silica (SiO2·nH2O)
mineraloid
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Mica Schist with Pyrite
Muscovite/Biotite Schist (Complex Silicate)
metamorphic
Green Jasper / Plasma
Microcrystalline Quartz (Chalcedony), SiO2 with inclusions
gemstone
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (CaCO3)
sedimentary
Red Jasper (Chert)
Silicon dioxide with iron inclusions (SiO2)
sedimentary
Limestone (specifically Dolomitic Limestone)
Calcium Magnesium Carbonate (CaMg(CO3)2)
sedimentary
Fossiliferous limestone
Calcite-rich limestone (primarily CaCO₃), possibly containing fossil fragments
sedimentary
Likely pyrite-bearing rock
Pyrite (FeS₂), possibly in a quartz- or sulfide-rich matrix
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Tufa (Limestone)
Calcareous Tufa (CaCO3)
sedimentary