Pink Stained Rock (Likely Quartzite or Sandstone with Iron Oxide Staining)
Quartzite (metamorphic) or Sandstone (sedimentary); coloration likely due to hematite or other iron oxides.
Category
Browse metamorphic or sedimentary (with staining) specimens identified by the Rock Identifier community.
Pink Stained Rock (Likely Quartzite or Sandstone with Iron Oxide Staining)
Quartzite (metamorphic) or Sandstone (sedimentary); coloration likely due to hematite or other iron oxides.
Quartz pebble
Silicon dioxide (SiO2)
Iron-stained weathered rock
Unknown
Milky quartz
Quartz, silicon dioxide (SiO₂)
Sandstone or Quartzite
Sandstone or Quartzite (SiO2 primarily)
Quartz (Pebble)
Silicon Dioxide (SiO2)
Iron-stained quartz vein rock
Quartz-rich vein material, predominantly SiO₂, with iron oxyhydroxides (goethite/limonite) and likely sulfide alteration
Iron-stained metamorphic rock, likely schist or quartzite
Quartz–mica–iron oxide rock; probable muscovite/biotite schist or ferruginous quartzite
Quartz pebble
Silicon dioxide (SiO2)
Quartz pebble with iron staining
Silicon dioxide (SiO2) with iron oxide impurities
Quartz-rich pebble
Mostly quartz (SiO₂), possibly a quartzite or vein-quartz fragment
Quartz with Iron Staining
SiO2 with Fe oxide impurities
Rough amber-colored quartz or calcite fragment
Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz with iron staining
Silicon dioxide (SiO2)
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
Silicified oyster fossil
Fossil oyster shell, commonly Ostrea or Crassostrea, replaced or encrusted by chalcedony/quartz
Quartz pebble
Silicon dioxide (SiO2)
Magnetite / Hematite rich ore
Magnetite (Fe3O4) or Hematite (Fe2O3)
Quartz with Iron Oxide Inclusions
SiO2
Quartz Pebble
Silicon Dioxide (SiO2)
Gneiss
Metamorphic Gneiss
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
Quartz with Iron Inclusions
SiO2
Quartz with Iron Oxide Staining
SiO2
Quartz (or Chalcedony) Specimen
Silicon Dioxide (SiO2)
Rounded stream pebbles (likely quartzite and iron-stained sandstone)
Quartzite (SiO₂), with a possible ferruginous sandstone pebble (quartz + iron oxides)
Quartz
Silicon Dioxide (SiO2)
Quartz with Iron Oxide
SiO2
Quartz Pebble
Silicon Dioxide (SiO2)
Weathered brown rock, likely sandstone or iron-rich quartzite
Indeterminate; probable quartz-rich sandstone (quartz, feldspar, iron oxides)
Quartz (Drusy/Crystalline)
Silicon Dioxide (SiO2)
Quartz fragment (Pebble)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Red Jasper
Microcrystalline Quartz (SiO2)
Quartz Boulder
Silicon Dioxide (SiO2)
Quartz Crystal
Silicon Dioxide (SiO2)
Zebra Jasper
Banded microcrystalline quartz (SiO2)
Quartz
SiO2 (Silicon Dioxide)
Quartz
Silicon dioxide (SiO2)
Weathered iron-rich metamorphic rock (probable amphibolite or schist fragment)
Likely hornblende–plagioclase amphibolite with biotite/chlorite alteration; exact identification requires testing
Quartz
Silicon Dioxide (SiO2)