Serpentine with Quartz Vein
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4 with SiO2 veins
metamorphic
Category
Mixed (Predominantly Sedimentary And Igneous)
Browse mixed (predominantly sedimentary and igneous) specimens identified by the Rock Identifier community.
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2)
Sedimentary Rock
Carnelian
Carnelian (Silicon Dioxide - SiO2 with Hematite impurities)
Mineral
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Chert (Gravel pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Chert / Flint Conglomerate
Silicified Sedimentary Breccia (primarily SiO2)
sedimentary
Terrazzo (with Marble and Granite fragments)
Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates
sedimentary (man-made composite)
Aventurine (Green)
Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2
metamorphic
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide impurities), formula: SiO2
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Epidosite
Epidosite (predominantly Epidote {Ca2Al2Fe3+Si3O12(OH)} and Quartz {SiO2})
metamorphic
Amethyst
Quartz (SiO2) with trace iron impurities
Mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Chrysoprase
Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities
mineral
Tiger's Eye
Tiger's Eye (SiO2 with crocidolite inclusions)
mineral
Ocean Jasper
Silicon Dioxide (SiO2)
Mineral_variety_of_Chalcedony
Anthracite Coal
Anthracite (a variety of coal, predominantly carbon)
Sedimentary Rock (Metamorphosed)
Coal (most likely Bituminous or Anthracite)
Coal (organic sedimentary rock)
Sedimentary
Tiffany Stone
Bertrandite (Be4Si2O7(OH)2) mixed with Fluorite (CaF2), Opal, and Chalcedony
mineral
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)
metamorphic
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Amber
Succinite (Fossilized Tree Resin), C10H16O
Organic Mineraloid
Rose Quartz
Rose Quartz (SiO2)
mineral
White Jade / White Chalcedony
Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)
Mineral
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Green Aventurine
Quartz (SiO2) with Fuchsite inclusions
Mineral
Gold
Gold (Au)
Mineral
Biotite Schist
Biotite Schist (predominantly K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Moonstone (bead form)
Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar
Mineral
Quartzite
Quartzite (predominantly SiO2)
metamorphic
Quartzite (with Iron Staining)
Quartzite (predominantly SiO2)
metamorphic
Quartzite (River Cobble)
Quartzite (predominantly SiO2)
metamorphic
Smoky Quartz
Quartz (SiO₂)
Mineral
Amethyst
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral
BROWN GRANITE (likely 'Tan Brown' or similar)
Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)
igneous
Red Sandstone
Clastic Sedimentary Mineraloid (predominantly Quartz grains with Iron Oxide cement)
sedimentary
Chakra Stone Bracelet (mixed gemstones)
Multi-mineral/Gemstone assembly (primarily Quartz variety beads)
mineral