Quartz on Basalt
Silicon Dioxide (SiO2) on Mafic Igneous Rock
Mineral on Igneous Rock
Category
Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)
Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Basalt (River Rock/Cobble)
Basalt (no specific mineral formula as it's a rock)
Igneous
Granite
Felsic Intrusive Igneous Rock
igneous
Quartz Vein in Host Rock
Quartz (SiO2) in Mafic or Sedimentary Matrix
igneous
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Gold Ore
Auriferous Quartz and Sulfide Mineralization in Host Rock
igneous
Quartz / Common Opal
Silicon Dioxide (SiO2)
mineral
Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)
Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)
Metamorphic
Clear Quartz Sphere
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Rhyolite (likely Green Jasper/Agate variety)
Silicon Dioxide (SiO2) with mineral inclusions
igneous
Granite
Granite (a phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Mica Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Pegmatite
Coarse-grained Igneous Rock (Granitic Pegmatite)
igneous
Quartz (Milky or Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Basalt
Basalt
Igneous
Granite (Dioritic variant)
Granite (Phaneritic Igneous Rock)
igneous
Granite
Granite (Phaneritic Quartz-Feldspar Rock)
Igneous
Scoria (Lava Rock)
Extrusive Igneous Scoria (Vesicular Basalt)
igneous
Stream Pebble (Basalt/Greywacke)
Mafic Igneous Rock (Fine-grained)
igneous
Dumortierite Quartz
Al7BO3(SiO4)3O3 (Borosilicate mineral/Quartz inclusion)
mineral
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Basalt
Mafic Igneous Rock
igneous
Blue Sapphire
Corundum (Al2O3) with iron and titanium impurities
mineral
Quartz Geode
Silicon Dioxide (SiO2) in a Geode body
sedimentary or igneous (host environment)
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Mineral
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)
metamorphic
Serpentinite
Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Sandstone (likely Quartz Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Rhyolite
Rhyolite (felsic volcanic rock)
igneous
Basalt
Basalt (dominated by plagioclase feldspar and pyroxene minerals)
Igneous
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Quartz (various varieties)
SiO₂ (Silicon Dioxide)
Mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Muscovite Mica
Muscovite / KAl2(AlSi3O10)(OH)2
mineral
Quartz (on matrix)
Quartz (Silicon Dioxide, SiO₂)
Mineral
Banded Gneiss (with possible weathered sulfide or iron staining)
Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides
Metamorphic