Green Aventurine
Silicon dioxide (SiO2) with fuchsite inclusions
mineral
Category
Sedimentary (Microcrystalline Silicate)
Browse sedimentary (microcrystalline silicate) specimens identified by the Rock Identifier community.
Fire Agate (Crackle Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Conglomerate with Quartzite Pebbles
Clastic sedimentary rock (Conglomerate)
sedimentary
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous
Chalcedony in Matrix
Silicon Dioxide (SiO2)
mineral
Jasper (Green Jasper / Bloodstone variant base)
Silicon Dioxide (SiO2) with impurities of chlorite and iron oxides
sedimentary
Tiger's Eye and Carnelian Quartz
Silicon Dioxide (SiO2)
metamorphic and mineral
Agate Geode
Cryptocrystalline Quartz (SiO2)
mineral
Quartzite with Chert inclusions
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Carnelian Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Chert (with Iron Staining)
Silicon Dioxide (SiO2)
sedimentary
Carnelian
Carnelian (Silicon Dioxide - SiO2)
mineral
Red Quartzite
Quartzite (SiO2)
metamorphic
Jasper Agate (specifically Brecciated Jasper with Agate inclusions)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Coquina
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Moqui Marble (Shaman Stone)
Ironstone Concretion (Fe2O3 - Hematite/Goethite shell with Sandstone core)
sedimentary
Fossiliferous Limestone (Crinoidal)
Bioclastic Limestone (predominantly CaCO3)
sedimentary
Ironstone (Limonitic Sandstone)
Ferruginous Sandstone (rich in Limonite: FeO(OH)·nH2O)
sedimentary
Banded Agate (with possible Chalcedony layers)
Silicon dioxide (SiO2)
sedimentary
Yellow Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Moqui Marble (Ironstone Concretion)
Goethite/Hematite Concretion (Fe2O3 / FeO(OH))
sedimentary
Red Jasper (Heliotrope family variant)
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2)
sedimentary
Chert (Iron-stained)
Chert (Silicon Dioxide, SiO2)
sedimentary
Petrified Wood
Silicified wood (principally SiO2)
sedimentary
Jasper pebble
Jasper (Silicon Dioxide, SiO2)
sedimentary
Picture Jasper (specifically Biggs or Deschutes variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Leopard Skin Jasper
Rhyolite (Silicon Dioxide with impurities), SiO2
igneous
Dalmation Stone (Dalmation Jasper)
Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)
igneous
Shale
Shale (Sedimentary rock composed of mud/clay minerals)
sedimentary
Quartzite River Stone
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Cobaltoan Calcite / Pink Dolomite (Possible)
Cobaltoan Calcite: (Ca,Co)CO3; Pink Dolomite (or Thulite): CaMg(CO3)2 or Mn-Dolomite / (Thulite: Mn2+3Al2(Si2O7)(SiO4)O(OH))
Mineral / Rock (depending on purity)
Limestone (Ocherous)
Calcium Carbonate (CaCO3) with Iron Oxide (Limonite)
sedimentary
Banded Chert or Chert with Quartz Veins
Chert (SiO2)
Sedimentary
Chert (Iron-stained)
Chert (primarily Microcrystalline Quartz, SiO2)
sedimentary
River Rock (River Cobbles)
Fluvial Conglomerate Clasts (primarily composed of various minerals such as Quartz, SiO2)
sedimentary
River Cobble (Phyllite or Quartzite)
Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)
metamorphic