Black Star Diopside
Diopside (CaMgSi2O6) with asterism
Mineral
Category
Metamorphic Or Igneous
Browse metamorphic or igneous specimens identified by the Rock Identifier community.
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Schist
Schist (various compositions)
metamorphic
Schist
Schist (various mineral compositions)
metamorphic
Smoky Quartz (with Hematite inclusions)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Milky Quartz with Iron Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Rough Garnet (likely Almandine or Pyrope)
Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3
mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Orthoclase Feldspar (Salmon variety)
Orthoclase, KAlSi3O8
mineral
Blue Sapphire (Ceylon)
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Milky Quartz (or Iron-Stained Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (River Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky or Rough Variety)
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2) - Yellow Quartz variety
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Marble
Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).
Metamorphic Rock
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)
mineral
Graphite
Graphite (C)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within metamorphic/igneous matrix
igneous/metamorphic
White Jade (Nephrite)
Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2
Mineral
Greenschist
Greenschist facies rock
Metamorphic
Quartz
Quartz (SiO₂)
Mineral
Quartz
Quartz (Silicon Dioxide, SiO2)
Mineral
Spessartine Garnet in Quartz/Feldspar Pegmatite
Spessartine (Mn3Al2(SiO4)3) in Quartz (SiO2) and Feldspar
Mineral in Igneous Rock
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Citrine
Citrine (Silicon Dioxide, SiO2)
mineral
Citrine Quartz Crystal Cluster
Silicon Dioxide (SiO2) with iron impurities
mineral
Ruby
Corundum (Aluminum Oxide with Chromium traces), Al2O3:Cr
mineral
Ruby
Corundum (Al2O3:Cr)
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodalite)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
NaFe3Al6(BO3)3Si6O18(OH)4
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Water and Silt (Sedimentary Environment)
Suspended Sediment / H2O (dihydrogen monoxide)
sedimentary
Milky Quartz with Iron Oxide Staining
Quartz (Silicon Dioxide, SiO2)
mineral