Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse sedimentary (secondary mineral) within igneous specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Amygdaloidal Basalt
Amygdaloidal Basalt
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
White Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Polished Hematite Tower
Hematite (Fe2O3)
Limestone with Calcite Crust
Sedimentary Calcium Carbonate (CaCO3)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
Copper-bearing Quartz (with Malachite and Iron Oxides)
Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)
Gneiss
Gneiss (High-grade metamorphic rock)
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2) with Hematite/Limonite
Agate (Plume or Moss Agate variant)
Chalcedony (SiO2) with various inclusions
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
Iron-Stained Quartz (Red/Hematoid Quartz)
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
Quartz with Iron Staining
Silicon Dioxide (SiO2) with iron oxide impurities
Aventurine
Silicon Dioxide (SiO2) with inclusions
Granitic Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
Pyrite
Iron Sulfide (FeS2)
Dalmation Stone (Dyed)
Peralkaline rhyolite
Weathered vesicular volcanic rock
Likely basaltic andesite or scoriaceous basalt; exact identification requires fresh surface and testing
Diamond
Diamond (pure carbon, C)
Specular Hematite with Quartz and Limonite
Hematite (Fe2O3) with Quartz (SiO2) and Limonite (FeO(OH)·nH2O)
Dalmatian Stone
Dalmatian Stone (a variety of aplite)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
Chalcedony (Botryoidal or Tumbled)
Chalcedony (SiO₂)
Gneiss
Gneiss
Agate Geode with Quartz Druzy
Cryptocrystalline Quartz (SiO2)
Fluorite
Calcium fluoride (CaF2)
Limestone with Calcite Crystals
Calcium Carbonate (CaCO3)
Rhodochrosite
Manganese carbonate (MnCO3)
Gneiss
Gneiss (Foliated Metamorphic Rock)
Gneiss
Metamorphic Gneiss
Hematite
Iron(III) oxide (Fe2O3)
Quartz (Milky/Crystal variety)
Silicon Dioxide (SiO2)
Quartz Druzy (on Calcedony/Quartz base)
Silicon Dioxide (SiO2)
Gneiss (with Quartzite and Mica)
Gneiss
Botryoidal Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
Greenstone Pebble
Metabasalt / Greenschist