Anthracite Coal
Anthracite (Carbon C)
metamorphic
Category
Mixed (Sedimentary, Igneous, And Metamorphic)
Browse mixed (sedimentary, igneous, and metamorphic) specimens identified by the Rock Identifier community.
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Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Mineral
Biotite Mica
K(Mg, Fe)3(AlSi3O10)(F, OH)2
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss
Gneiss (a type of metamorphic rock)
Metamorphic Rock
Serpentine
Antigorite-Lizardite-Chrysotile (Mg3Si2O5(OH)4)
metamorphic
Quartz (Pink / Rose Quartz variant)
Silicon Dioxide (SiO2)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Red Calcite
Calcium Carbonate (CaCO3)
mineral
Rhodochrosite
Rhodochrosite, Manganese Carbonate (MnCO3)
mineral
Quartzite River Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Sodalite in Quartz
Na8(Al6Si6O24)Cl2 (Sodalite) / SiO2 (Quartz)
metamorphic
Green aventurine quartz (probable)
Quartz, SiO₂, with fuchsite or other green mica inclusions
mineral
Ruby (Corundum)
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Mica (Biotite or Phlogopite variety)
Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)
mineral
Sapphire
Corundum (Al2O3)
gemstone
Tumbled Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
gemstone
Quartz (Quartzite or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Serpentine / Antigorite
Mg3Si2O5(OH)4 (Serpentine Group)
metamorphic
Orange Aventurine (or Tumbled Carnelian)
Quartz (SiO2) with inclusions
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Fuchsite in Quartz (or Emerald in Fuchsite / Verdite)
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Quartz Matrix
metamorphic
Mica (Biotite or Phlogopite Buchsam)
Silicate Mineral (Phyllosilicate family)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz Pendant
Silicon Dioxide (SiO2)
mineral
Sunstone
Feldspar group (Plagioclase / Oligoclase)
mineral
Moonstone
Orthoclase (Potassium Feldspar), (K,Na)AlSi3O8
mineral
Tumbled Stones Collection (Tiger's Eye, Snowflake Obsidian, Aventurine, etc.)
Silica minerals (primarily SiO2)
mineral
Green Tourmaline (Verdelite)
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Bornite
Copper Iron Sulfide (Cu5FeS4)
mineral
Labradorite
Plagioclase Feldspar ((Ca, Na)(Al, Si)4O8)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Smoky Quartz (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Gemstones (Emerald and Yellow Topaz or Citrine)
Beryl (Be3Al2Si6O18) and Quartz (SiO2) or Topaz (Al2SiO4(F,OH)2)
mineral
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
mineral
Amazonite
K(AlSi3O8)
mineral
Sunstone
(Ca,Na)((Al,Si)2Si2)O8 (Plagioclase Feldspar)
mineral