Blue Chalcedony
Silicon Dioxide (SiO2)
Category
Browse this appears to be a man made metallic object, likely jewelry, not a natural rock, mineral, or geological specimen. specimens identified by the Rock Identifier community.
Blue Chalcedony
Silicon Dioxide (SiO2)
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
Quartz Pebble
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Chert Geode with Quartz Druzy
Microcrystalline Quartz (SiO2) with macrocrystalline Quartz
Quartz with Chalcopyrite
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Caribbean Calcite
Calcium Carbonate (CaCO3) with Aragonite
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
River Cobble (Basaltic/Andesitic)
Mafic Igneous Porphyritic Rock
Gold Nugget
Native Gold (Au)
Petrified Wood
Silicified Wood (SiO2)
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
Gold Nugget
Native Gold (Au)
Tanzanite
Blue Zoisite (Ca2Al3(SiO4)3(OH))
Diamond (in a gold setting)
Carbon (C)
Rutilated Quartz
Quartz with Rutile inclusions (SiO2 with TiO2)
Limonite (Ironstone Concretion)
Hydrous ferric oxides (FeO(OH)·nH2O)
Citrine
Silicon Dioxide (SiO2) with iron impurities
Quartz chunk
Silicon dioxide (SiO2)
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
Pyrite
Iron Sulfide (FeS2)
Quartz Geode
Silicon Dioxide (SiO2) within a geode
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Quartz (Pale Rose or Milky Variety)
Silicon Dioxide (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
Agate
Silicon Dioxide (SiO2)
Quartz (small fragment)
Silicon Dioxide (SiO2)
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)
Diamond
Diamond (pure Carbon, C)
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Pyrite-bearing Schist
Pyritic Quartz-Mica Schist with FeS2 inclusion
Milky Quartz Pebbles
Silicon Dioxide (SiO2)
Citrine
Silicon Dioxide (SiO2)
Hematite
Ferric Oxide (Fe2O3)
Milky Quartz with Chlorite/Moss Infusions
Silicon Dioxide (SiO2)
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
Amber
Succinates (Organic Fossilized Resin)
Citrine
Citrine (Silicon Dioxide, SiO2)