Quartzite
Quartzite (SiO2)
metamorphic
Category
Organic (Non Rock)
Browse organic (non rock) specimens identified by the Rock Identifier community.
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Shale (with Iron Staining)
Argillaceous mudstone / Shale
sedimentary
Pink granite or pink feldspathic rock
Granite, chiefly quartz, potassium feldspar, and plagioclase; exact identification is uncertain from the image
igneous
Petrified Wood
Silicified wood (SiO2)
fossil
Fossiliferous Limestone
Calcium carbonate (CaCO3) with fossil inclusions
sedimentary
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartz-veined Limestone
Sedimentary limestone with quartz/calcite veinlets
sedimentary
Quartz-veined Siltstone/Greywacke
Clastic Sedimentary Rock with Quartz Infill (SiO2 vein)
sedimentary
Quartzite
Quartzite (primarily SiO2)
metamorphic
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological
Chert (Nodule)
Microcrystalline or Cryptocrystalline Silica (SiO2)
sedimentary
Obsidian
Volcanic Glass (High silica amorphous rock)
igneous
Red Jasper
Silicon Dioxide (Microcrystalline Quartz), SiO2
mineral
River-worn Chert
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (C10H16O)
Organic Mineraloid
Amber
Succinite (Formula: C10H16O)
Organic Mineraloid
Amber (Butterscotch/Egg Yolk Variety)
Succinite (Approx. C10H16O)
Organic Gemstone
Weathered quartz-rich rock, possibly quartzite or iron-stained quartz
Quartzite (mostly SiO₂), with possible iron-oxide staining and minor feldspar/mica
metamorphic
Black Obsidian
Obsidian (Volcanic glass), 70–75% SiO2
igneous
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (with potential fossil inclusions)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Stromatolite
Biogenic sedimentary rock / Calcium carbonate
sedimentary
Weathered mafic rock, likely basalt or gabbro
Basalt–gabbroic rock; chiefly plagioclase feldspar and pyroxene, with possible olivine and magnetite
igneous
Bivalve seashell
Calcareous shell, primarily aragonite (CaCO₃); likely a modern cockle or related bivalve
fossil
Sandstone
Arenite
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Yellow Quartzite River Stone
Quartzite (SiO2)
metamorphic
Fossilized Shark Tooth
Chondrichthyes teeth
fossil
Quartzite
Metamorphic Quartz-rich Rock
metamorphic
Eclogite
Eclogite (Omphacite-Garnet Rock)
metamorphic
Weathered mafic rock, likely basalt
Basalt; predominantly plagioclase feldspar and pyroxene, possibly olivine and iron oxides
igneous
Apache Tear
Obsidian (Hydrated Silica Rich Volcanic Glass)
igneous
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Oyster Shell
Ostreidae (Calcium Carbonate - CaCO3)
fossil
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Basalt (River Pebble)
Basalt
igneous
Bituminous Coal
Coal (Organically derived sedimentary rock)
sedimentary
Petrified Wood
Silicified wood (permineralized organic tissue)
fossil