Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Category
Not A Rock Or Mineral (Anthropogenic Material)
Browse not a rock or mineral (anthropogenic material) specimens identified by the Rock Identifier community.
Green Chalcedony (likely Green Agate or Chrysoprase)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Mineral
Granite
Felsic Intrusive Igneous Rock
igneous
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions
metamorphic
Sandstone Concretion with Quartz Center
Sedimentary Clastic Rock (SiO2 matrix with Quartz core)
sedimentary
Gneiss
Gneiss
metamorphic
Limonite Concretion
Goethite-rich Concretion (FeO(OH))
sedimentary
Wishing Stone (Basalt/Greywacke with Quartz Vein)
Basalt or Siltstone with SiO2 (Quartz) hydrothermal intrusion
igneous/sedimentary
Basalt
Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Coquina
Coquina (a type of limestone)
Sedimentary
Obsidian
Amorphous volcanic glass (primarily SiO2)
igneous
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Gneiss (specifically Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Sandstone
Arenite (SiO2 principal)
sedimentary
Granite featuring Quartz Vein
Granite with hydrothermal silica (SiO2) intrusion
igneous
Green Quartzite
Quartzite (primarily SiO2 with chlorite inclusions)
metamorphic
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (SiO2) with impurities (mostly Iron Oxides)
Mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Kimberlite with Diamond
Kimberlite (Porphyritic Peridotite)
igneous
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
mineral
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Basalt with Caliche Crust
Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating
igneous
Carnelian
Carnelian (SiO2)
mineral
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)
sedimentary
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite and Quartz inclusions
sedimentary
Limonite (often after Hematite or Goethite)
Limonite (FeO(OH)·nH2O)
mineral
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
Mineral
Chert Conglomerate (or Breccia)
Sedimentary Clastic Rock (variety: Ferruginous Chert Breccia)
sedimentary
Red Mudstone (Siltstone)
Lutite (primarily Quartz and Clay minerals with Hematite)
sedimentary
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Garnetiferous Quartzite (Garnet Gneiss Pebble)
Garnet-bearing Quartzite or Quartz-Feldspar Gneiss
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Granite
Phaneritic Igneous Rock (Granite)
igneous
Green Aventurine (Green Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (chromium-rich mica)
metamorphic
Diamond
Diamond (C)
Mineral
Diabase (Dolerite) Cobble
Diabase / Dolerite
igneous
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2 - a variety of actinolite, an amphibole mineral); Jadeite (Na(Al,Fe3+)Si2O6 - a pyroxene mineral)
Metamorphic rock (for both Nephrite and Jadeite)
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Mineral