Quartz Vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Igneous/Metamorphic Matrix
mineral
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.
Learn about Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite) in the encyclopedia
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Epidote
Epidote (formula: Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Gneiss
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Blue Lace Agate
Chalcedony (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Granite (specifically the Ubatuba variety)
Phaneritic Igneous Rock (Granodiorite/Monzogranite)
igneous
Biotite Gneiss
Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)
metamorphic
Granite
Granite (Felsic intrusive igneous rock)
igneous
Granite Gneiss
Gneiss (Polymetamorphic Quartz-Feldspar-Mica rock)
metamorphic
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
metamorphic
Peridot (Olivine)
Olivine, (Mg, Fe)2SiO4
mineral
Quartz (Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt
Basalt (Extrusive Mafic Igneous)
igneous
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Tektite
Tektite (high-silica natural glass)
Mineraloid
Quartz / Vein Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Snowflake Obsidian
Spherulitic Volcanic Glass (SiO2 + impurities)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Red Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Greenstone
Greenschist (metamorphosed mafic igneous rock)
metamorphic
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
Mineral
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Gneiss
Gneissic Metamorphic Rock
metamorphic
Rough Corundum (likely Sapphire/Zircon-bearing)
Aluminium Oxide (Al2O3)
mineral
Granite with Mafic Inclusions
Granite (Phaneritic igneous rock composed of Quartz, Feldspar, and Mica)
igneous
Dalmatian Jasper
Dalmatian Stone (Felsite with Arfvedsonite/Tourmaline)
igneous
Amygdaloidal Basalt
Amygdaloidal Mafic Volcanic Rock
igneous
Laterite
Laterite (no specific mineral formula as it's a rock type)
Sedimentary
Gneiss (Cobble)
Gneiss
metamorphic
Schist (Greenschist / Mica Schist)
Metamorphic rock rich in platy minerals (e.g., Chlorite/Mica schist)
metamorphic
Greenschist (Chlorite Schist)
Greenschist (containing chlorite, actinolite, and epidote)
metamorphic
Biotite Schist
Biotite-rich Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Gneiss
Gneiss
metamorphic
Banded Gneiss
Gneiss (Felsic to Mafic Metamorphic Rock)
metamorphic
Banded Siltstone
Siltstone (primarily SiO2 with Al2O3)
sedimentary
Greenstone Pebble
Metabasalt (often containing chlorite, actinolite, or epidote)
metamorphic
Slag Glass
SiO2 (Silicon Dioxide) with impurities
man-made glass
Snowflake Obsidian
Volcanic glass containing Spherulitic inclusions (SiO2 + impurities)
igneous
Greenschist (or Serpentinite with Manganese Dendrites)
Greenschist facies metamorphic rock
metamorphic
Greenstone / Graywacke
Metagraywacke or Chlorite Schist
metamorphic
Dalmatian Jasper
Dalmatian Stone (not a true Jasper, primarily a Perthitic Feldspar with Arfvedsonite)
igneous