Jasper (Iron-rich Microcrystalline Quartz)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Category
Sedimentary Rock (Possibly A Conglomerate Or Coarse Grained Sandstone)
Browse sedimentary rock (possibly a conglomerate or coarse grained sandstone) specimens identified by the Rock Identifier community.
Laterite
Lateritic Soil/Rock (rich in Fe2O3 and Al2O3)
sedimentary
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz grains)
sedimentary
Chert / Flint Nodules in Sandstone
Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock
sedimentary
Quartzite River Cobble
Quartzite (primarily SiO2)
metamorphic
Basalt with Caliche Crust
Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating
igneous
Ironstone (with possible Hematite/Limonite coating)
Ironstone (Fe-rich sedimentary rock)
sedimentary
Turquoise
Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)
mineral
Quartzite Pebble (River Rock)
Quartzite (primarily SiO2)
metamorphic
River Stone (River Pebbles)
Alluvial Deposit (typically Quartzite, Sandstone, or Granite clasts)
sedimentary
Quartzite and Chert
Silicon Dioxide (SiO2)
metamorphic and sedimentary
Ferruginous Quartzite (Chert)
Quartzite with Iron inclusions (SiO2 + Fe2O3)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock
Pink Quartzite
Quartzite (mainly SiO2 with iron oxide impurities)
metamorphic
Pink Quartzite
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
River Stone (likely Siltstone or fine-grained Basalt)
Clastic Sedimentary (Siltstone) or Mafic Igneous (Basalt)
sedimentary or igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Zebra Jasper
Silicon dioxide (SiO2) with various impurities
Sedimentary
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
sedimentary
Oolitic Limestone
Oolitic Carbonate (CaCO3)
sedimentary
Quartzite Beach Pebble
Quartzite (primarily SiO2)
metamorphic
Ventifact
Eolian Ventifact (often composed of basalt, chert, or quartzite)
sedimentary
Quartzite Pebble
Quartzite (predominantly Silicon Dioxide - SiO2)
metamorphic
Limonite Concretion
Limonite (FeO(OH)·nH2O)
sedimentary
Ferruginous Sandstone (Gozzan)
Iron-rich clastic sedimentary rock with Limonite/Goethite
sedimentary
Garnet-Mica Schist
Garnetiferous Porphyroblastic Schist
metamorphic
Chalcedony (Agate/Quartz)
Silicon Dioxide (SiO2)
mineral
Chalk / Sedimentary Limestone
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Septarian Nodule
Septarian concretion (Complex mixture of Siderite/Limestone, Calcite, and Aragonite)
sedimentary
Jasper River Stone
Silicon Dioxide with Iron Oxide impurities (SiO2 + Fe2O3)
sedimentary
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Banded Gneiss
Gneiss (typically quartz, feldspar, mica, amphibole composition)
metamorphic
Ferruginous Sandstone (Gozzan-like)
Ferruginous Sandstone (SiO2 with FeO(OH) inclusions)
sedimentary
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Black Veined Jasper (Spiderweb Jasper)
Silicon Dioxide (SiO2)
sedimentary