Petrified Wood
Silicified Wood (primarily SiO2)
Category
Browse mineral, often found in sedimentary deposits specimens identified by the Rock Identifier community.
Petrified Wood
Silicified Wood (primarily SiO2)
Galena
Galena (Lead Sulfide), PbS
Greywacke
Greywacke sandstone
Chert (White/Gray variety)
Chert (SiO2)
Gold Nugget Jewelry
Native Gold (Au)
Chrome Diopside
Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities
Black Sapphire (Basaltic Blue Sapphire)
Corundum (Al2O3)
Diamond
Diamond (C)
Travertine
Terrestrial Sedimentary Limestone (CaCO3)
Gold Nugget
Native Gold (Au)
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn+2,Fe+2,Mg,Ca)SiO3
Sandstone
Arenite (SiO2 based with mineral cement)
Chert (Iron-rich or Jasperoid)
Cryptocrystalline Quartz (SiO2)
Chert / Chalcedony (likely carnelian or flint variety)
Silicon Dioxide (SiO2)
Greywacke (River Slikenside)
Greywacke (Lithic Sandstone)
Conglomerate
Clastic sedimentary rock (Conglomerate)
Magnetite
Iron(II,III) oxide (Fe3O4)
Sandstone (Water-worn)
Arenite
Jasper
Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)
Beryl (likely Emerald or Aquamarine in matrix)
Beryllium aluminum silicate (Be3Al2Si6O18)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)
Chert (and Flint)
Silicon Dioxide (SiO2)
Milky Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Chert (with small quartz inclusion)
Microcrystalline Silica (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) impurities
Tiger's Eye and Carnelian Quartz
Silicon Dioxide (SiO2)
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
Bornite
Bornite (Cu5FeS4)
Amethyst
Quartz (SiO2) variety
Sandstone (Quartzose)
Arenite (SiO2 based)
Sandstone
Arenite (composed primarily of SiO2)
Gold
Native Gold (Au)
Chert (often called Flint)
Cryptocrystalline Quartz (SiO2)
Jasper River Pebble
Jasper (Silicon Dioxide, SiO2)
White Jade / White Chalcedony
Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)