Petrified Wood
Silicified Wood (SiO2)
mineral
Category
Mineral, Sediment
Browse mineral, sediment specimens identified by the Rock Identifier community.
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Conglomerate
Clastic Sedimentary Rock (Conglomerate)
sedimentary
Polished brecciated jasper
Jasper, an opaque microcrystalline quartz variety (SiO₂), with iron-oxide and clay/mineral inclusions
gemstone
River Pebble
Siliceous rock fragment
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Fossil Brachiopod
Phylum Brachiopoda
fossil
Fossilized Shark Tooth
Elasmobranchii (various species, possibly Carcharias or Odontaspis)
fossil
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Fossil oyster shell
Fossilized bivalve, likely Ostrea or Crassostrea; calcite (CaCO₃) shell
fossil
Petrified Wood
Silicon Dioxide (SiO2)
fossil
Ironstone Concretion
Ferruginous Sandstone / Siderite Concretion
sedimentary
Banded Sandstone (River Pebble)
Arenite (SiO2 primarily)
sedimentary
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
sedimentary
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
sedimentary
Ironstone Concretion
Limonitic/Hematitic Concretion
sedimentary
Sandstone Geode (Ironstone Concretion)
Arenite with Limonite/Hematite matrix (SiO2 with Fe-oxides)
sedimentary
Crinoid Stem Fossil (in matrix)
Crinoid (Class Crinoidea)
fossil
Tumbled orbicular jasper (probable)
Jasper, microcrystalline quartz (SiO₂), with iron- and clay-rich inclusions
mineral
Fossil Shark Tooth
Carcharodon sp. (likely Otodus or similar Lamniformes order)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO₂)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Bone Chunk
Permineralized Vertebrate Bone (indeterminant)
fossil
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Rhodonite
Rhodonite ((Mn2+,Fe2+,Mg,Ca)SiO3)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Specular Hematite (Specularite) in Matrix
Specularite (Fe2O3)
mineral
Tumbled brown quartz/chert pebble
Microcrystalline quartz (SiO₂), possibly chert or jasper
mineral
Tumbled reddish-brown stone, likely jasper
Jasper (microcrystalline quartz, SiO₂), possibly red jasper or jasper-rich chert
mineral
Amber
Succinates (Organic Fossilized Resin)
mineral
Gold
Native Gold (Au)
mineral
Quartz-rich mica schist (probable)
Muscovite–quartz schist, possibly with feldspar and biotite
metamorphic
Bumblebee Jasper
Carbonate-rich volcanic sediment with arsenic and sulfur inclusions
sedimentary
Polished brecciated jasper (likely septarian or iron-rich jasper)
Microcrystalline quartz (chalcedony), SiO₂, with iron oxides and possibly calcite or other rock fragments
sedimentary
Shale and Pebble Fragment
Sedimentary Rock (Mudstone/Shale with Silica Pebble)
sedimentary
Fossilized Bark
Lepidodendron / Sigillaria fossil impression
fossil
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Hematite
Hematite (Α-Fe2O3)
mineral
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sand and Gravel (Quartz-rich)
Unconsolidated fluvial/beach sediment (primarily Silica/SiO2)
sedimentary