Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Category
Sedimentary Rock (Technically A Microcrystalline Quartz Mineral Aggregate)
Browse sedimentary rock (technically a microcrystalline quartz mineral aggregate) specimens identified by the Rock Identifier community.
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Botryoidal Chalcedony (Quartz Var.)
Silicon Dioxide (SiO2)
mineral
Tumbled jasper (likely brown jasper)
Microcrystalline quartz/chalcedony (SiO₂), colored mainly by iron oxides
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Banded Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Limestone (River Pebble)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Chert Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Chalcedony (Carnelian/Yellow Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Mineral
Quartz pebble
Silicon Dioxide (SiO2)
sedimentary
Ocean Jasper
Spherulitic Chalcedony (SiO2)
sedimentary
Dalmatian Jasper
Dalmatian Stone (a porphyritic peralkaline igneous rock)
igneous
River Pebble (Quartz/Sandstone)
Silicon Dioxide (SiO2) Mix
sedimentary
Chalcedony (variations like Agate or Jasper)
Chalcedony (SiO₂ - microcrystalline quartz)
Mineral
Chert or chalcedony nodule
Microcrystalline quartz (SiO₂), possibly weathered chert
mineral
Quartz-veined Sandstone Pebble
Quartzose Sandstone with Quartz Veinlets
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Dalmatian Jasper
Peralkaline Quartz-Feldspar Igneous Rock
igneous
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Geode / Fossilized Gastropod or Shell Cast
Silicon dioxide (Quartz) replacement / fossil mold
sedimentary
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock
igneous
Bumblebee Jasper
Fossiliferous Calcite containing Orpiment and Realgar
sedimentary
River Pebble / Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Quartz geode
Microcrystalline and crystalline quartz, SiO₂, likely with chalcedony and iron-oxide staining
mineral
Chert (Banded)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (with Quartz Vein)
Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)
sedimentary
Tumbled brown chert or jasper
Microcrystalline quartz (SiO₂), likely iron-stained chert/jasper
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Bauxite
Bauxite (Al2O3·2H2O)
sedimentary
Chert (Holey Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Bauxite
Bauxite (Al2O3·2H2O)
sedimentary
Banded Calcite
CaCO3
sedimentary
Quartz (Microcrystalline/Gravel)
Silicon Dioxide (SiO2)
mineral
Chert (Jaspery variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone with Quartz Vein
Quartzose Sandstone with Hydrothermal Quartz
sedimentary
Agate with Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Jasper pebble
Silicon Dioxide (SiO2 with iron oxide inclusions)
sedimentary
Quartz-veined Sandstone Pebble
Quartzite-veined Arenite
sedimentary
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
mineral
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
River Stone (Quartzite/Chert mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2) Pebble
sedimentary