Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Quartz Pebble
Silicon Dioxide (SiO2)
Chert (variously Flints)
Microcrystalline Quartz (SiO2)
Sandstone (Quartzose)
Arenite
Sandstone
Clastic Sedimentary Rock
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
Clear Quartz
Silicon Dioxide (SiO2)
Mica-rich schist, likely lepidolite or muscovite schist
Mica schist; predominantly muscovite KAl₂(AlSi₃O₁₀)(OH)₂, possibly lithium-rich lepidolite
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Gray Limestone
Carbonate rock (CaCO3)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Chert (Flint)
Microcrystalline quartz (SiO2)
Chert / Flint
Cryptocrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (River Stone)
Microcrystalline Quartz (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Sandstone pebble
Sandstone (SiO2 with iron oxides)
Quartz Cluster (Likely Ferruginous)
Silicon Dioxide (SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz pebble
Silicon dioxide (SiO2)
Quartz with Pyrite and Iron Staining
Silicon Dioxide (SiO2) with Iron Disulfide (FeS2) inclusions
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
Amethyst (Tumbled Chips)
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
Flagstone
Sedimentary Sandstone / Flagstone
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
Pyrite-bearing Rock / Pyrite Ore
Iron Sulfide (FeS2) in host rock matrix
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz
SiO2 (Silicon dioxide)
Quartz
Silicon Dioxide (SiO2)
Quartz Geode / Druzy Quartz
Silicon Dioxide (SiO2)
Pebble
Lithified rock fragment / Sedimentary clast
Red Jasper
Chalcedony (SiO2) with iron inclusions
Chert (Tan/Yellow variety)
Microcrystalline quartz (SiO2)
Quartz (Milky and Smoky variety)
Silicon Dioxide (SiO2)