Rhodonite (in matrix)
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Mineral
Category
Anthropogenic (Man Made Product Subject To Geological Processes)
Browse anthropogenic (man made product subject to geological processes) specimens identified by the Rock Identifier community.
Magnetite
Magnetite (Fe3O4)
Mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sphalerite with Galena
Zinc Sulfide ((Zn,Fe)S) and Lead Sulfide (PbS)
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Halite
Halite (NaCl)
mineral
Blue Crackle Quartz (Dyed Quarzite)
Silicon Dioxide (SiO2) with artificial dye
Metamorphic (modified)
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
sedimentary
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
mineral
Ferrous Slag
Iron/Steel Slag (Complex Calcium-Alumino-Silicates)
Anthropgenic (Industrial Byproduct)
Zebra Jasper
Silicon Dioxide (SiO2) - Macro-crystalline Quartz/Chert with impurities
sedimentary
Limestone (specifically Fossiliferous Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
Mineral
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Specular Hematite (Specularite)
Hematite (Iron(III) oxide) - Fe2O3
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pumice
Pumice (extrusive volcanic rock)
igneous
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
metamorphic
Milky Quartz
Quartz (Silica / Silicon Dioxide), SiO2
mineral
Chert (specifically Flint)
Chert (SiO2)
sedimentary
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Silver (Jewelry form)
Native Silver (Ag)
mineral
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Moldavite
Tektite (Impact Glass), ~80% SiO2 + Al2O3
tektite
Zinc Ore (Sphalerite in Matrix)
Sphalerite (Zn,Fe)S within a carbonate or silicate host rock
mineral
Sandstone
Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)
Sedimentary
Green Quartz (Prasiolite variant or Aventurine)
Silicon Dioxide (SiO2)
mineral
Mahogany Obsidian Arrowhead
Volcanic Glass with Hematite/Magnetite inclusions (Amorphous Silicon Dioxide)
igneous
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate)
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
CaCO3 (principally Calcite)
sedimentary