Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral With Artificial Coating
Browse mineral with artificial coating specimens identified by the Rock Identifier community.
Learn about Mineral With Artificial Coating in the encyclopedia
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Sandstone
Arenite
sedimentary
Slate
Slate (foliated metamorphic rock)
metamorphic
Weathered Sandstone Cobble
Arenite / Quartz Sandstone
sedimentary
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Fossilized Echinoid
Echinoidea (likely of the order Echinoidea)
fossil
Obsidian and Phantom Quartz
Volcanic Glass (SiO2 + MgO + Fe3O4) and Crystalline Quartz (SiO2)
igneous and mineral
Bivalve Fossil (Internal Mold/Steinkern)
Class Bivalvia (Fossilized Mold)
sedimentary
Conglomerate
Conglomerate
sedimentary
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Schist
Mica Schist
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineralological
Obsidian
Obsidian (Volcanic Glass)
igneous
Selenite (Satin Spar)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Quartzite with Hematite staining
Quartzite (SiO2)
metamorphic
Granite Pebble
Phaneritic intrusive igneous rock
igneous
Vesicular Basalt with Magnetite/Hematite
Mafic Extrusive Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Granitic Pegmatite
Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)
igneous
Granite
Granite (Alkali-feldspar granite)
igneous
Unakite
Epidotized Granite
metamorphic
Diorite (Polished River Pebble)
Diorite (Intermediate intrusive igneous rock)
igneous
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Geode (Unopened)
Crystalline Quartz or Chalcedony filled Geode (SiO2)
sedimentary
Marble
Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)
metamorphic
Moss Agate
SiO2
mineral
Chalcedony in Matrix (likely Agatized Coral or Chert)
Silicon Dioxide (SiO2)
sedimentary
Imperial Topaz
Al2SiO4(F,OH)2
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Turquoise in Matrix
Hydrous phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Smoky Quartz (Herkimer-style)
Silicon Dioxide (SiO2)
mineral
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Pearl (with Peridot)
Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4
mineral
Quartz with Mica
Silicon Dioxide (SiO2) with Phyllosilicates (Mica)
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Sunstone
Plagioclase Feldspar (containing (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions)
mineral
Rhyolite with Agate/Quartz Vugs
Rhyolite (Volcanic Rock) containing SiO2 (Silica) vugs
igneous
Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)
Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein
igneous or sedimentary