Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
Mineral, Sediment
Browse mineral, sediment specimens identified by the Rock Identifier community.
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Jasper with Iron Staining
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) impurities
sedimentary
Petrified Wood
Silicified wood (SiO2 - Silicon Dioxide)
sedimentary
Sandstone
Arenite
sedimentary
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2 + Fe2O3
sedimentary
Jasper (Banded Argillite/Chert mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Crinaudite / Fossilized Crinoid Stem
Crinoid (Echinodermata) in a Calcitic/Siliceous Matrix
sedimentary
Staurolite (Fairy Cross)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Red Jasper with Quartz Veining
Jasper (Silicon Dioxide, SiO2) with Quartz (SiO2) inclusions
sedimentary
Jasper with Manganese Dendrites
Silicon Dioxide (SiO2) with Oxide Mineral Inclusions
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) - Opaque Chert/Quartzite variety
sedimentary
Muscovite Mica (likely on Quartz/Feldspar)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Picture Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Septarian Nodule (Galt)
Calcareous concretion / Septarian concretion
sedimentary
Chert Breccia (Yellow Jasper)
Silicon Dioxide (SiO2) - Brecciated Chert
sedimentary
Shale (with Iron Oxide staining)
Fissile Mudstone (primarily Quartz and Clay minerals)
sedimentary
Rhodonite
Rhodonite (MnSiO3)
mineral
Dyed Howlite (simulating Lavender/Purple Jade or Charoite)
Howlite: Ca2B5SiO9(OH)5 (when natural)
Mineral
Chert Pebble / Brachiopod Fossil Internal Mold
Silicon Dioxide (SiO2) / Fossil: Brachiopoda (generic internal mold)
sedimentary
Bumblebee Jasper
Calcite with Arsenic and Manganese oxides (technically a volcanic rock)
igneous
Belemnite Fossil (Guard)
Belemnoidea (Carbonate/Calcite replacement)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Ferruginous Sandstone (Iron-rich Sandstone)
Ferruginous Arenite
sedimentary
Fossilized Coral (Petoskey-style)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Amber
Succinurite (C10H16O)
mineraloid
Siltstone with flute casts or scratch marks
Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)
sedimentary
Red Jasper (Poppy Jasper variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz (Iron-stained or Ferruginous)
Silicon Dioxide (SiO2)
mineral
Gastropod Steinkern (Internal Mold Fossil)
Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Favosites (Honeycomb Coral Fossil)
Favosites sp. (Phylum Cnidaria, Order Tabulata)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Ferruginous Sandstone (Ironstone)
Ferruginous Sandstone / Limonite-cemented Quartz Sandstone
sedimentary
Orthoceras Fossil in Limestone
Orthoceras regulare (Class Cephalopoda; Order Orthocerida)
sedimentary
Conglomerate
Conglomerate (Detrital sedimentary rock)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary