Turquoise
Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Category
Mineral (Variety Of Chalcedony)
Browse mineral (variety of chalcedony) specimens identified by the Rock Identifier community.
Obsidian
Volcanic Glass (SiO2 - Silicon Dioxide with impurities)
igneous
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2 + Fe2O3
sedimentary
Schist
Mica Schist (variety: Muscovite/Biotite Schist)
metamorphic
BROWN GRANITE (likely 'Tan Brown' or similar)
Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)
igneous
Citrine Quartz
Silicon Dioxide (SiO2) - Ferric Iron impurities
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Iron-stained Milky Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Vesicular Basalt (commonly mistaken for Slag)
Scoriaceous Basalt (composed primarily of Plagioclase Feldspar and Pyroxene)
igneous
Obsidian
Volcanic Glass (SiO2 rich)
igneous
Rough Green Beryl (Emerald variety)
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Quartz (Smoky/Milky variety with matrix)
Silicon Dioxide (SiO2)
mineral
Aragonite (Star Cluster or Twinned variety)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Amethyst (Chevron or Dream Amethyst variety)
Tectosilicate Silicon Dioxide (SiO2) with iron impurities
mineral
Quartz (Milky/Smoky variety on matrix)
Silicon Dioxide (SiO2)
mineral
Green Aventurine (Propably a tumbled variety)
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
mineral
Yellow Quartz / Quartzite Pebble
Silicon Dioxide (SiO2)
mineral
Aquamarine and clear quartz
Aquamarine (Be3Al2Si6O18), Quartz (SiO2)
Mineral
Porphyry
Porphyritic Andesite/Basalt
igneous
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Chert (Green variety)
Microcrystalline Opaline/Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Mineral (Man-modified)
Ferruginous Quartz (Iron-stained Quartzite)
Silicon Dioxide (SiO2) with Hematite/Limonite impurities
metamorphic
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Obsidian
Volcanic glass (high silica volcanic rock)
igneous
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Slag Glass
Anthropogenic Amorphous Silicon Dioxide
mineral
Serpentinite
Serpentinite (composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite)
metamorphic
Obsidian
Volcanic glass (SiO2 - Silicon Dioxide with impurities)
igneous
Banded Jasper
Silicon Dioxide (SiO2)
Mineral/Sedimentary Rock (as a cryptocrystalline variety of quartz)
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Metamorphic Rock
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with Crocidolite or Magnesio-riebeckite inclusions
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Rose Quartz
Silicon Dioxide with trace inclusions (SiO2)
Mineral
Rose Quartz
Silicon Dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
mineral
Obsidian
Volcanic Glass (predominantly SiO2)
igneous