Quartzite (specifically a river-worn pebble)
Quartzite (primarily SiO2)
metamorphic
Category
Anthropogenic Specimen (Man Made)
Browse anthropogenic specimen (man made) specimens identified by the Rock Identifier community.
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Yellow Quartzite Pebble
Quartzite (SiO2)
metamorphic
Basalt
Basalt (composition of plagioclase feldspar, pyroxene, and olivine)
igneous
Amber (Dark/Black Variety)
Succinite (Resinite), C10H16O
mineral
Quartz (River Stone)
Silicon Dioxide (SiO2)
mineral
Jasper (Wonderstone/Banded Jasper)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary (chemical/biological origin) or volcanic-related metamorphic
Sandstone (Grooved/Weathered)
Arenite (composed primarily of Quartz and Lithic fragments)
sedimentary
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
![Granite with Quartz Vein (Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)) — igneous](https://media.rockidentification.com/50ebadd6-ed66-4e73-abce-e70c662464c5-thumbnail.jpg)
Granite with Quartz Vein
Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)
igneous
Sandstone (specifically Banded Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Milky Quartz Pebble (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Granite Pebble (River Rock)
Phaneritic Felsic Igneous Rock
igneous
Siltstone with flute casts or scratch marks
Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Moonstone
Adularia (Potassium Aluminum Silicate, KAlSi3O8)
mineral
Mookaite Jasper
Silicified Porcellanite (SiO2 with impurities)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Green Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe)
sedimentary
Porphyritic Basalt (likely Chinese Writing Stone)
Porphyritic Basalt / Plagioclase Feldspar in Basal Matrix
igneous
Amethyst
Amethyst (Varietal of Quartz), SiO2 with traces of Iron (Fe3+)
mineral
Agate Geode with Quartz Druzy
Chalcedony (SiO2) and Quartz (SiO2)
mineral
Prase or Green Quartz
Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)
Mineral
Amethyst (Quartz)
Silicon Dioxide (SiO2) with iron impurities
mineral
Pyrite in Shale
Iron Sulfide (FeS2) in Argillaceous Shale
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Black Opal
Hydrated Silica (SiO2·nH2O)
mineral
Smoky Quartz
Smoky Quartz (SiO2)
mineral
Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)
metamorphic
Yellow Jasper
Silicon dioxide (SiO2)
sedimentary
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Moonstone
Orthoclase (KAlSi3O8) with inclusions of Albite (NaAlSi3O8)
mineral
Carnelian
Carnelian (Silica, SiO2)
mineral
Quartz with Mica inclusions (likely Iron-stained)
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Granitic Pegmatite with Schorl Tourmaline
Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
Dragon Blood Jasper (Epidote with Piedmontite or Quartz)
Epidote-rich Quartzite / SiO2 with (Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))
metamorphic