Orange Quartzite (or Aventurine Quartz)
Quartzite (primarily SiO2 with Hematite or Goethite inclusions)
metamorphic
Category
Sedimentary Rock (Technically Chert, A Microcrystalline Quartz)
Browse sedimentary rock (technically chert, a microcrystalline quartz) specimens identified by the Rock Identifier community.
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Map Jasper (Picasso Stone)
Metamorphosed Calcium Carbonate (Crystalline Limestone or Marble with Silicate inclusions/impurities)
metamorphic
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone (Stream-rounded)
Arenite (SiO2 based)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)
Mineral
Sandstone (likely Calcareous or Quartz-rich)
Arenite (SiO2 based typically)
sedimentary
Sandstone
Sandstone (Clastic Sedimentary Rock)
Sedimentary Rock
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Chert (Flint nodule)
Silicon dioxide (SiO2)
sedimentary
Brown Sandstone
Arenite (primarily Quartz and Feldspar, with Iron Oxide cement)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Chert (Iron-stained)
Silicon Dioxide (SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2)
Sedimentary Rock
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
Metamorphic or Igneous (context dependent)
Sandstone
Sandstone (clastic sedimentary rock), primarily SiO2
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Quartz in Host Rock
Silicon Dioxide (SiO2) in Rhyolite or Granite matrix
igneous
Chert (often referred to as Flint or Jasper)
Chalcedony (SiO2) - Silicon Dioxide
sedimentary
Petrified Wood
Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)
sedimentary
Sandstone with trace fossil
Sandstone, possibly with Skolithos or similar trace fossil
sedimentary
Dalmatian Stone
Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)
igneous
Tree Agate
Silicon Dioxide (SiO2) with Dendritic Inclusions
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Jasper (Cream/Yellow variety)
Silicon dioxide (SiO2)
sedimentary
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Sandstone
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Milky Quartz (Crystal Cluster)
Silicon Dioxide (SiO2) - Quartz Variety
mineral
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartzite Pebble (with Iron Inclusions)
Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)
metamorphic
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary