Granite
Granitoid
igneous
Category
Mineral Based Human Made Alloy
Browse mineral based human made alloy specimens identified by the Rock Identifier community.
Learn about Mineral Based Human Made Alloy in the encyclopedia
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Snowflake Obsidian
Volcanic glass containing Cristobalite (SiO2)
igneous
Granite
Felsic Plutonic Rock
igneous
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Magnetite
Magnetite (Fe3O4)
Mineral
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Shark Tooth
Elasmobranchii fossil (likely Odontaspididae family)
sedimentary
Vesicular Basalt with Oxidation
Scoriaceous Olivine Basalt (Mafic volcanic rock)
igneous
Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Mineral
Pegmatite with Lepidolite and Feldspar
Pegmatite (containing K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 and KAlSi3O8)
igneous
Amethyst (Pale/Light Variety)
Quartz (Silicon Dioxide) with Iron impurities - SiO2
mineral
Sandstone (Lithic Wacke)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
sedimentary
Gneiss
Gneiss
metamorphic
Diorite
Phaneritic Intermediate Igneous Rock
igneous
Chert (often found as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Schist
Mica Schist
metamorphic
Basalt with Calcite Veining
Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene) with CaCO3 veins
igneous
Granite
Granite (Phaneritic igneous rock)
igneous
Graphic Granite / Pegmatite
Graphic Granite (Alkali Feldspar and Quartz)
igneous
Chert (Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Basalt with Caliche Crust
Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating
igneous
Basalt with Quartz Vein
Mafic Igneous Rock (SiO2 filling)
igneous
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions
igneous
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primarily)
sedimentary
Granodiorite (River Cobble)
Granodiorite (contains Quartz, Plagioclase Feldspar, Biotite Mica)
igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous
Graphite
Graphite (Native Carbon), Formula: C
Metamorphic
Diorite
Plutonic Igneous Rock (NaAlSi3O8, CaAl2Si2O8)
igneous
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Bloodstone (Heliotrope)
SiO2 (Cryptocrystalline Quartz / Chalcedony)
mineral
Lepidolite
Lepidolite - K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Fe/Mn/Mg)
mineral
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Slag (Industrial Glass Slag)
Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)
Mineraloid (Industrial byproduct)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Orbicular Jasper (Ocean Jasper variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Greenstone
Greenschist / Meta-basalt
metamorphic
Diorite (Spotted)
Diorite (Intrusive igneous rock)
igneous
Granite
Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)
igneous