Yellow Jasper
Jasper, a microcrystalline variety of Quartz (SiO2) with iron inclusions
sedimentary
Category
Sedimentary (If Natural Jasper) Or Artificial (If Slag)
Browse sedimentary (if natural jasper) or artificial (if slag) specimens identified by the Rock Identifier community.
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Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Weathered gray stone, possibly limestone or concrete-like carbonate rock
Tentatively micritic limestone (calcium carbonate, CaCO₃); exact identification is uncertain from the image
sedimentary
Hag Stone
Sandstone or Limestone with Solution Holes (Bioturbation/Erosion)
sedimentary
Jasper (brecciated or orbicular jasper)
Microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides and other impurities
mineral
Geode / Fossilized Gastropod or Shell Cast
Silicon dioxide (Quartz) replacement / fossil mold
sedimentary
Quartz (Smoky/Milky)
Silicon Dioxide (SiO2)
mineral
Jasper and Quartz River Cobble
Silicon Dioxide (SiO2) with Hematite inclusions
Sedimentary / Metamorphic
Chert (Holey Stone)
Microcrystalline Quartz (SiO2)
sedimentary
Coquina (Hag Stone variant)
Biocalcarenite (Coquina)
sedimentary
Breccia
Breccia (Clastic sedimentary rock)
sedimentary
Sandstone (Whetstone/Sharpening Stone)
Siliciclastic Sandstone (SiO2 dominant)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in sedimentary host rock
sedimentary
Yellow Ochre (Limonite)
Limonite (FeO(OH)wH2O)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2)
gemstone
Native Silver Nugget
Silver (Ag)
mineral
Milky Quartz Geode / Chalcedony Nodule
Quartz (Silicon Dioxide - SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Limestone (Buff/Tan)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Siliceous Pebble)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Moqui Marble (Iron Concretion)
Goethite/Hematite Cement Sandstone Concretion
sedimentary
Chert (with Limestone cortex)
Silicon Dioxide (SiO2)
sedimentary
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Bauxite (Pisolitic Bauxite)
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary
Red Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)
sedimentary
Conglomerate
Clastic sedimentary rock (Polymictic Conglomerate)
sedimentary
Likely quartz fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz or quartz-rich rock
mineral
Agate with Fossil/Inclusion
Silicon Dioxide (SiO2) with chalcedony and potential fossil inclusion
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Riverstone (likely Graywacke or Siltstone)
Sedimentary sandstone (Graywacke), SiO2 dominant
sedimentary
Sandstone Cobble with Iron Staining
Arenite with Limonite/Goethite coatings
sedimentary
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Tumbled zebra stone, likely zebra marble or banded calcite
Zebra marble (recrystallized calcite, CaCO₃), possibly black-and-white banded calcite
metamorphic
Jasper pebble (Yellow/Brown Jasper)
Silicon Dioxide (Microcrystalline Quartz, SiO2 with Iron Oxide impurities)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
igneous
Dalmation Stone (Dalmation Jasper)
Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)
igneous
Sandstone
Arenite (SiO2 dominant)
sedimentary
Jasper (specifically Yellow Jasper and Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary