Agate
Silicon Dioxide (SiO2)
Category
Browse anthropogenic (man made industrial deposit) specimens identified by the Rock Identifier community.
Agate
Silicon Dioxide (SiO2)
Sulfur on Quartz
Native Sulfur (S8) with Quartz (SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
Quartz Druzy on Matrix (with Copper Mineralization)
Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
Quartz Pebble
Silicon Dioxide (SiO2)
Limonite (with goethite)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Sandstone (Quartzose)
Arenite (composed mainly of SiO2)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Quartz (Rose or Clear variety)
Silicon Dioxide (SiO2)
Rough Amethyst Quartz
Silicon Dioxide with Iron impurities (SiO2)
Agate (Moss or Plume Agate variety)
Silicon Dioxide (SiO2)
Rose Quartz
Silicon dioxide (SiO2)
Greenstone (Greenschist)
Greenschist (composed of Chlorite, Epidote, and Actinolite)
Quartzite
Quartzite (primarily SiO2)
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Quartzite Pebble
Quartzite (primarily SiO2)
Chert (Agate/Flint variant)
Microcrystalline Quartz (SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
Limestone
CaCO3 (Mainly Calcite or Aragonite)
Limestone (Micrite/Chalky variety)
Calcium Carbonate (CaCO3)
Chalcedony (Agate/Quartz variety)
Cryptocrystalline Quartz (SiO2)
Banded Agate (often called Brown Agate or Chalcedony)
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Rose Quartz
Quartz (Silicon Dioxide) - SiO2
Quartzite River Rock
Quartzite (SiO2)
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2)
Chalcedony (specifically Common Opal or Agate variant)
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
Agate (Polished Nodule)
Agate (Silicon Dioxide, SiO2)
Quartzite
Quartzite (primarily SiO2)
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2), a variety of Actinolite-Tremolite
Pink Chalcedony
Silicon Dioxide (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Jasper
Silicon dioxide (SiO2)