Green Fluorite
Calcium Fluoride (CaF2)
mineral
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
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Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Agate
Banded Chalcedony (SiO2 - Silicon Dioxide)
mineral
Peridot in Basalt/Xenolith
Olivine (Mg, Fe)2SiO4 in Vesicular Basalt
igneous
Lazulite
Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2
mineral
Corundum (Sapphire/Ruby in Matrix)
Aluminium oxide (Al2O3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Sapphire
Corundum (Al2O3)
mineral
Rhodonite Tumbled Chips
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Polished labradorite cabochon
Labradorite, a calcic plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈
mineral
Black Sapphire
Corundum (Al2O3 with inclusions of hematite or ilmenite)
mineral
Polished greenstone (likely serpentinite)
Serpentinite, chiefly antigorite/lizardite Mg₃Si₂O₅(OH)₄, possibly with magnetite
metamorphic
Garnet amphibolite / Metamorphic Rock
Garnet Amphibolite (Hornblende - Almandine schist/gneiss)
metamorphic
Pink Granite
Granite (Alkali-feldspar granite)
igneous
Tumbled sodalite beads
Sodalite, Na8(Al6Si6O24)Cl2, commonly with minor white calcite or nepheline
mineral
Likely polished bronzite or serpentine-rich rock
Probable bronzite, an iron-bearing orthopyroxene (Mg,Fe)SiO₃; exact identification requires testing
mineral
Amazonite
Triklinic Potassium Feldspar (KAlSi3O8)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Tourmaline (likely Schorl)
Tourmaline Group Mineral (e.g., Schorl for black varieties); (Na,Ca)(Li,Mg,Fe,Mn,Al)3Al6(BO3)3Si6O18(OH)4
Mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Quartz River Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Yellow Aventurine)
Silicon Dioxide (SiO2) with inclusions
mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Chalcedony (Smoky Quartz or Agate nodule fragment)
Silicon Dioxide (SiO2)
mineral
Garnet (Almandine)
Almandine Garnet (Fe3Al2(SiO4)3)
gemstone
Pyrite
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural radiation
mineral
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Rose Quartz
Rose Quartz (SiO2 with trace Ti, Fe, or Mn)
mineral
Yellow Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Rough Garnet (likely Almandine or Pyrope)
Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3
mineral
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
mineral
Epidote in Matrix
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Pegmatite
Igneous Pegmatite (Quartz-Feldspar-Biotite)
igneous
Blue Sapphire
Corundum (Al2O3 - Aluminum Oxide with Iron and Titanium impurities)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
mineral