Category
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
Unknown Organic Object (likely a berry or fruit)
Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.
Conglomerate
Conglomerate (clastic sedimentary rock)
Lemon (Mock specimen mimicking Citrine/Sulfur)
Citrus x limon
Garnet
Garnet Group (formula varies: e.g., Almandine Fe3Al2Si3O12 or Pyrope Mg3Al2Si3O12)
Conglomerate
Clastic Sedimentary Conglomerate (SiO2, CaCO3 dominant)
Conglomerate
Conglomerate (clastic sedimentary rock)
Conglomerate
Conglomerate (clastic sedimentary rock type)
Conglomerate
Conglomeratic Sandstone
Conglomerate
Conglomerate (Sedimentary Clastic Rock)
Conglomerate
Conglomerate (clastic sedimentary rock)
Conglomerate
Conglomerate (SiO2 matrix with varying clasts)
Ferruginous Conglomerate
Conglomerate with Iron-Oxide Matrix (SiO2 + Fe2O3/FeO(OH))
Conglomerate
Conglomerate
Conglomerate
Conglomerate (clastic sedimentary rock)
Agatized or Silicified Fossil/Coral, or Jasper
SiO2
Conglomerate
Conglomerate (clastic sedimentary rock)
Conglomerate
Sedimentary Conglomerate
Garnet
Garnet Group (e.g., Almandine, Pyrope)
Conglomerate
Conglomerative Rudite (SiO2/CaCO3 matrix)
Conglomerate
Conglomerate rock
Puddingstone (Conglomerate)
Conglomerate (clastic sedimentary rock)
Fossil Shark Tooth
Carcharodon sp. (likely Otodus or similar Lamniformes order)
Likely bituminous coal
Coal, predominantly carbon-rich organic matter with variable maceral and mineral content
Conglomerate
Conglomerate (clastic sedimentary rock)
Garnet (likely Almandine or Pyrope)
Garnet (Group Name), Fe3Al2(SiO4)3 or Mg3Al2(SiO4)3
Garnet in Schist or Pegmatite
Almandine Garnet (Fe3Al2(SiO4)3) in host rock
Fossil Shark Tooth
Odontaspididae (likely Carcharias sp.)
Jasper
Silicon dioxide, SiO2
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
Petrified Wood
Silicified Wood (SiO2)
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Fossil Shark Tooth
Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth
Puddingstone
Conglomerate
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
Tumbled yellow jasper or silicified rock fragment
Microcrystalline quartz (chalcedony), SiO₂, likely iron-oxide colored
Chert (Common Opal/Agatized Rock)
Microcrystalline Quartz (SiO2) with potential Chalcedony/Opaline silica
Fossiliferous Chert (with Fossil Shells)
Silicon Dioxide (SiO2) with biogenic inclusions
Brown chalcedony (likely jasper or petrified wood fragment)
Microcrystalline quartz, SiO₂; brown coloration likely from iron oxides
Fossiliferous Sandstone with Plant Remains
Arenite with Carbonaceous impressions (likely Paleozoic/Mesozoic Flora)
Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
Chert
Chert (SiO₂)
