Marble (White)
Metamorphosed Limestone (mainly CaCO3)
Category
Browse mineral with metamorphic or sedimentary host specimens identified by the Rock Identifier community.
Marble (White)
Metamorphosed Limestone (mainly CaCO3)
Green Aventurine
Silicon Dioxide (SiO2) with Chromium-rich Fuchsite mica
Schist
Schist
Tiger's Iron
Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Phyllite
Phyllite
Quartz
Silicon Dioxide (SiO₂)
Muscovite Mica
Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Banded Gneiss
Gneiss (pronounced "nice")
Petrified Wood
Silicified Wood (SiO2)
Garnet in Schist (Polished Tower)
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
Quartz River Pebbles
Silicon Dioxide (SiO2)
Magnetite
Magnetite (Fe3O4)
Zebra Jasper
Silicon Dioxide (SiO2) with various inclusions
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Green Quartz (Aventurine)
Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
Quartzite / Sandstone / Chert Mix
Silicon Dioxide (SiO2)
Amethyst Quartz
SiO2 (Silicon Dioxide)
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock
Included Quartz (Garden Quartz / Lodolite)
Quartz (SiO2) with various mineral inclusions
Quartz (likely Milky Quartz or Chalcedony)
Quartz (SiO2 - Silicon Dioxide)
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Red Jasper (Brecchiated Jasper)
Silicon Dioxide (SiO2) with Hematite impurities
Jasper (Iron-rich Chalcedony)
Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)
Quartzite with Sandstone/Iron staining
Metamorphic Quartzite (SiO2)
Gneiss
Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)
Marble
Recrystallized Calcite (CaCO3)
Epidote
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
Mica Schist (Garnetiferous)
Garnet-Mica Schist
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Pyrite in Matrix (Gold-colored Chalcopyrite or Pyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Jadeite and Assorted Corundum (Ruby/Sapphire) / Beryl (Emerald)
Jadeite (NaAlSi2O6), Ruby/Sapphire (Al2O3), Emerald (Be3Al2(SiO3)6)
Hematite
Hematite (Fe2O3)
Almandine Garnet
Fe3Al2(SiO4)3
Quartz
Quartz (SiO₂ - Silicon Dioxide)
Quartz
Silicon dioxide (SiO2)
Mixed Tumbled Gemstones and River Rocks
Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)
Hematite
Hematite (Fe2O3)
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)