Pitted Sedimentary Rock / Cupstone
Sedimentary rock with weathering pit (arenite / sandstone)
sedimentary
Category
Man Made Rock (Sedimentary Analogue)
Browse man made rock (sedimentary analogue) specimens identified by the Rock Identifier community.
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Sandstone (Painted)
Arenite (primarily SiO2)
sedimentary
Shale (or Mudstone)
Laminose Mudrock (composition: clay minerals, quartz, and mica flakes)
sedimentary
Metaconglomerate
Metaconglomerate (Quartzite conglomerate)
metamorphic
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)
Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration
gemstone
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Gold
Native Gold (Au)
mineral
Sandstone (Garden Boulder)
Sandstone (SiO2 dominated)
sedimentary
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Fossil Assortment and Geological Specimens
Various (including Ammonoidea)
fossil
Shale (sub-type: Carbonaceous Shale)
Lutaceous Sedimentary Rock
sedimentary
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Chert (variations include Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Hag Stone (Flint with natural hole)
Silicon Dioxide (SiO2) - Nodular Chert / Flint
sedimentary
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
sedimentary
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Sandstone Pebble
Sandstone (primarily SiO2)
sedimentary
Shale
Sedimentary pelitic rock
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (Microcrystalline or cryptocrystalline Quartz - SiO2)
sedimentary
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (Field-collected Arrowhead-shaped Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Zebra Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary (fossilized)
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Generic Pebble
Lithic Fragment
sedimentary
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Sandstone (Weathered Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone with Lichen and Iron Oxide Staining
Quartz Arenite / Sandstone
sedimentary
Desert Rose (Barite Rose / Gypsum Rose)
Barium Sulfate (BaSO4) or Hydrous Calcium Sulfate (CaSO4%22H2O)
mineral
Brachiopod Fossil
Phylum Brachiopoda
fossil
Sandstone
Arenite (SiO2 dominant)
sedimentary
Quartz Geode
Quartz (Silicon Dioxide, SiO2)
mineral
Siltstone / Slate
Siltstone / Low-grade Slate
sedimentary
Chert (and Jasper/Flint variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary