Clear Quartz (Tumbled)
Quartz (Silicon Dioxide - SiO2)
mineral
Category
Sedimentary (With Some Aspects Of Mineral Replacement)
Browse sedimentary (with some aspects of mineral replacement) specimens identified by the Rock Identifier community.
Quartz (Common Milky Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Gneiss
Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)
metamorphic
Chert (Chalcedony/Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Hag Stone
Perforated Sandstone (composed of SiO2 and calcareous cement)
sedimentary
Sunstone
Plagioclase feldspar (with Copper or Hematite inclusions)
mineral
Amazonite
Microcline (KAlSi3O8) with lead inclusions
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Black Chert
Chert (microcrystalline quartz)
Mineral
Zebra Rock (Zebra Stone / Ribbon Stone)
Siltstone with Ferruginous Banding (Primarily Quartz, Kaolinite, and Hematite)
sedimentary
Jasper / Chert (River Pebble)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron oxide inclusions)
sedimentary
Bryozoan Fossil
Phylum Bryozoa (commonly known as 'moss animals')
sedimentary
Red Jasper
Jasper (SiO2 with Fe2O3 inclusions)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Tiger's Eye
Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2
metamorphic
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Amber
Resinite / Fossilized Tree Resin
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)
metamorphic
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH))
sedimentary
Sunstone
Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)
mineral
Botryoidal Chalcedony (Agate/Carnelian)
Chalcedony (SiO2)
mineral
Sunstone
Oligoclase (Plagioclase Feldspar Group) - (Ca, Na)(Al, Si)4O8
mineral
Smoky Quartz in Matrix
Silicon Dioxide (SiO2)
mineral
Sandstone (with possibly iron oxides and other minerals)
Sandstone
Sedimentary rock
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
Mineral
Black Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Chert (Flint)
Microcrystalline Opaline Silica (SiO2)
sedimentary
Banded Iron Formation (BIF) with Quartz
Banded Iron Formation, often composed of alternating layers of hematite (Fe2O3) or magnetite (Fe3O4) and chert (microcrystalline quartz, SiO2)
Sedimentary
Blue Tiger's Eye
Silicon Dioxide (SiO2) with Crocidolite inclusions
Mineral (Pseudomorph)
Pebble (likely Quartz or Chert)
SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.
Sedimentary Rock
Chert (often called Flint or Jasper when red)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2
sedimentary
Ironstone Pebble
Ferruginous sedimentary rock (Fe2O3 / FeO(OH) mixed with SiO2)
sedimentary
Gowganda Tillite (Puddingstone)
Glacial Diamictite (Gowganda Formation)
sedimentary
Graphite Schist
C (Carbonaceous Schist)
metamorphic
Chert (Jasper or Flint variant)
Chert (composed of microcrystalline quartz, SiO2)
sedimentary