Picture Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
Synthetic (Not A Rock Or Mineral)
Browse synthetic (not a rock or mineral) specimens identified by the Rock Identifier community.
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Agate (Lace Agate Geode Slice)
Silicon Dioxide (SiO2)
mineral
Sandstone with Foliose Lichen
Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)
sedimentary
Kambaba Jasper
Stromatolite / Fossilized Algae (Rhyolitic structure)
sedimentary
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Sandstone
Arenite (composed primarily of SiO2, or Silicon Dioxide)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Blue Lace Agate (Banded Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Banded Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Amethyst (Quartz)
Silicon Dioxide with Iron impurities (SiO2)
mineral
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide impurities), formula: SiO2
mineral
Geode (Quartz)
Silicon Dioxide (SiO2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (with potential iron-oxide staining)
Arenite (primarily SiO2)
sedimentary
Iron-stained Quartzite / Chert
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite in Matrix
Fluorite (CaF2) within a host rock matrix
Mineral
Herkimer Diamond
Quartz (Silicon Dioxide) - SiO2
mineral
Vesicular Basalt with Amygdaloidal Infill
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
igneous
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Red Sandstone
Arenite (primarily SiO2 with hematite/iron oxide coating)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Rose or Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium or Manganese
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Agate (Crazy Lace or Eye Agate)
Silicon Dioxide (SiO2)
mineral
Unakite or Epidosite
Epidosite (Mineral composition: Epidote, Feldspar, and Quartz)
metamorphic
Agate
Silicon dioxide (SiO2)
mineral
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite
mineral
Blue Lace Agate
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Gold Nugget Jewelry
Native Gold (Au)
mineral
Pyrite in Shale
Iron Disulfide (FeS2)
mineral
Red Sandstone
Arenite (primarily composed of SiO2 with Fe2O3 cement)
sedimentary
Amethyst (Agate/Chalcedony variety)
Silicon Dioxide (SiO2) with iron impurities
mineral