Hagstone (Adder Stone)
Chert or Sedimentary pebble with natural perforation
sedimentary
Category
Mineral Or Sedimentary Rock (With Mineral Inclusions)
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
Learn about Mineral Or Sedimentary Rock (With Mineral Inclusions) in the encyclopedia
View all →
Quartz-rich pebble
Mostly quartz (SiO₂), possibly a quartzite or vein-quartz fragment
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Polished red jasper and carnelian-like stones
Jasper: microcrystalline quartz (SiO₂), commonly colored by iron oxides; translucent piece may be carnelian, a chalcedony variety
mineral
Sandstone
Arenite
sedimentary
Sandstone Concretion with Quartz Center
Sedimentary Clastic Rock (SiO2 matrix with Quartz core)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Chalcedony (Agate / Moss Agate)
Silicon Dioxide (SiO2)
mineral
Gneiss (probable)
Quartz–feldspar–mica gneiss; exact mineral composition cannot be confirmed from the image
metamorphic
Sandstone (Calcareous or Ferruginous)
Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Tumbled brown jasper (likely brecciated jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions
mineral
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Polished brecciated jasper
Jasper (microcrystalline quartz, SiO₂), likely brecciated and iron-oxide stained
metamorphic
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Limonite Concretion
Limonite (Hydrated iron oxide) FeO(OH)·nH2O
sedimentary
Granular Sandstone
Arenite (variable composition, primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite
sedimentary
Red Jasper
Jasper (Silicate mineral - SiO2)
sedimentary
Merlinite (dendritic opal)
Common opal (hydrated amorphous silica, SiO₂·nH₂O) with dark manganese-oxide dendrites; the trade name “merlinite” is also applied to other patterned stones.
sedimentary
Sandstone (River Cobble / Pebble)
Sedimentary Rock (Quartz Sandstone / Arenite)
sedimentary
Conglomerate (or Breccia / Porphyry)
Clastic Sedimentary Rock (Conglomerate / Sandstone)
sedimentary
Sandstone
Arenite (typically SiO2 + others)
sedimentary
Pink-and-white quartz pebble
Quartz, SiO₂, likely milky quartz with iron-stained or rose-colored zones
mineral
Sandstone
Arenite
sedimentary
Tumbled Agate
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Pebble)
Sandstone (principally SiO2 with iron oxide impurities)
sedimentary
Polished orbicular jasper (likely ocean jasper)
Silicified microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions
gemstone
Fossiliferous Sandstone / Mudstone
Sedimentary Rock (Clastic with Fossiliferous Inclusions)
sedimentary
Sandstone (with carbonaceous plant fragments)
Arenite (composed primarily of SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Red Jasper (or Agate/Jasper mixture)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Dalmatian jasper (likely orbicular rhyolite)
Silica-rich rhyolite, commonly sold as Dalmatian jasper; typically quartz, feldspar, and dark amphibole/biotite inclusions
igneous
Fancy Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Sandstone (Banded)
Arenite
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock), SiO2 + various minerals
sedimentary
Common Pebble / Sedimentary Rock Fragment
Lithified clastic sediment
sedimentary