Amazonite
Potassium Feldspar (Microcline) - KAlSi3O8
mineral
Category
Anthropogenic Specimen (Man Made)
Browse anthropogenic specimen (man made) specimens identified by the Rock Identifier community.
Erythrite
Erythrite (Cobalt Bloom) - Co3(AsO4)2·8H2O
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)
sedimentary
Quartz with Mica (Schist/Pegmatite fragment)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
igneous/metamorphic
Azurite with Malachite and Limonite
Azurite Cu3(CO3)2(OH)2 / Malachite Cu2CO3(OH)2
mineral
Alexandrite in Matrix
Chrysoberyl (BeAl2O4 with Chromium impurities)
mineral
Chert (or Flint)
Chert (Sedimentary Cryptocrystalline Sio2)
sedimentary
Oolitic Ironstone
Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)
sedimentary
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Red Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)
sedimentary
Ferruginous Quartz
Quartz (Silicon Dioxide, SiO2) with Iron Oxides
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst
Silicon dioxide with iron impurities (SiO2)
mineral
Tiger Iron
Tiger Iron (composite of Tiger's Eye, Red Jasper, and Hematite)
metamorphic
Jasper (likely Lake Superior Jasper)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Fairy Stone (Staurolite Twin)
Staurolite (Fe,Mg,Zn)2Al9Si4O22(OH)2
metamorphic
Prehnite
Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)
mineral
Chalcedony (Botryoidal/Drusy Quartz)
Silicon Dioxide (SiO₂)
Mineral
Tree Agate
Silicon Dioxide (SiO2) with Dendritic Inclusions
Mineral
Amethyst (Faceted)
Silicon Dioxide with Iron impurities (SiO2)
mineral
Fuchsite on Quartzite
Muscovite (Chromium-bearing) K(Al,Cr)2(AlSi3O10)(OH)2
metamorphic
Pyrite with Calcite
Iron Disulfide (FeS2) with Calcium Carbonate (CaCO3)
mineral
Fuchsite (Green Muscovite in Quartz)
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Tree Agate
Silicon Dioxide (SiO2) with inclusions of manganese and iron oxides
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Hemimorphite on Limonite Gossan
Hemimorphite (Zn4Si2O7(OH)2·H2O) on Limonite matrix
mineral
Lapis Lazuli
Lazurite-dominant Metamorphic Rock (complex aluminosilicate)
metamorphic
Rose Quartz
SiO2 (Silicon Dioxide with trace amounts of titanium, iron, or manganese)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Fuchsite on Quartz
Muscovite (KAl2(AlSi3O10)(OH)2) with Chromium impurities
metamorphic
Banded Calcite (Mexican Onyx)
Calcium Carbonate (CaCO3)
sedimentary
Carnelian (Banded Agate)
Chalcedony (SiO2) with Iron Oxide inclusions
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper Breccia
Brecciated Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Amazonite
Microcline (KAlSi3O8)
mineral
Jasper (Red and Yellow)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Fire Agate
Chalcedony (Silicon Dioxide, SiO2) with Limonite/Goethite
mineral
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary or Igneous Matrix
igneous
Picture Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary