Serpentine
Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)
metamorphic
Category
Metamorphic (Localized) Or Sedimentary
Browse metamorphic (localized) or sedimentary specimens identified by the Rock Identifier community.
Pyrite with Iron Oxides (Fool's Gold in Matrix)
Iron Sulfide (FeS2)
mineral
Pyrite in Matrix (often with Chalcopyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Quartz (Druzy) in host rock
SiO₂ (Silicon Dioxide) as Quartz, with unspecified host rock components (likely silicates and iron oxides)
Mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Specular Hematite
Iron Oxide (Fe2O3)
mineral
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Shungite
Shungite (carbon-rich Precambrian mineraloid)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Green Kyanite
Kyanite (Al2SiO5)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Kyanite in Quartz
Kyanite (Al2SiO5)
mineral
Dolomite
Dolomite (CaMg(CO3)2)
Mineral
Blue Kyanite
Kyanite (Al2SiO5)
Mineral
Magnetite (likely with weathered Limonite/Hematite)
Magnetite (Fe3O4) with iron oxide weathering
mineral
Pyrite (on Quartz matrix)
Iron Sulfide (FeS2)
mineral
Picture Jasper
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Rhodolite Garnet
Magnesium Aluminum Silicate; formula: (Mg,Fe)3Al2(SiO4)3
mineral
Red Jasper (Chert)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Zebra Jasper
Jasper (variety of Quartz/Chalcedony), SiO2
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Dragon Blood Jasper
Epidote-containing Quartz and Chlorite (SiO2 + (Ca2(Al, Fe)3(SiO4)3(OH)))
sedimentary
Beach Pebble (Chert/Quartzite)
Microcrystalline Quartz (SiO2)
sedimentary
Anthracite
Anthracite Coal (C)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Anthracite
Anthracite Coal
sedimentary
Almandine Garnet
Almandite (Fe3Al2(SiO4)3)
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Red Jasper
Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)
Mineral
Nephrite Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
Mineral
Sapphire
Corundum (Al2O3)
mineral
Nephrite Jade
Nephrite
Mineral/Rock