Jasper (Red/Brown)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
Sedimentary (Cryptocrystalline Silica)
Browse sedimentary (cryptocrystalline silica) specimens identified by the Rock Identifier community.
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Kambaba Jasper
Stromatolite Jasper (Microcrystalline Quartz with Cyanobacteria fossile)
sedimentary
Black Jasper
Silicon Dioxide (SiO2) with Carbonaceous inclusions
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2 with trace Fe2O3)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Sandstone (with potential trace fossils)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Mineral
Conglomerate
Conglomeratic Sandstone / Sedimentary Breccia
sedimentary
Common Opal (Green Opal / Pistachio Opal)
Hydrated silica (SiO2·nH2O)
mineraloid
Herkimer Diamond
Quartz (Silica - SiO2)
mineral
Green Moss Agate
Silicon Dioxide (SiO2) with inclusions of hornblende or chlorite
sedimentary
Boulder Opal
Precious Opal in Ironstone (Amorphous Hydrated Silica, SiO2·nH2O)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Red Jasper
Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions
sedimentary/mineral
Carnelian Agate
Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony
mineral
Green Aventurine
Silicon Dioxide (Quartz) with inclusions of Fuchsite mica (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Chalcedony
Microcrystalline Quartz (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (SiO2)
mineral
Quartz (Peach/Orange variety)
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
mineral
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian Agate
Carnelian (Silicon Dioxide - SiO2)
mineral
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Clear Quartz (Rock Crystal Fragments)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Sandstone Concretion
Ferruginous Sandstone Concretion
sedimentary
Sandstone
Arenite (primarily SiO2, silica)
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary