Quartz Vein in Matrix
Silicon Dioxide (SiO2) within Rhyolitic or Granitic Matrix
igneous
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.
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Greenstone
Metabasalt (Greenstone)
metamorphic
Metagabbro / Epidote Gneiss
Epidote bearing Hornblende Gneiss
metamorphic
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Calcite (Yellow/Orange variety - sometimes called Honey Calcite)
Calcite
Mineral
Dumortierite Quartz
Dumortierite (Al7BCuO15)
metamorphic
Gold in Quartz Matrix
Native Gold (Au) with Quartz (SiO2) and Slate/Shale
mineral
Quartz
Silicon dioxide (SiO2)
Mineral
Tektite (Indochinite)
Tektite (Natural Glass, SiO2 + Al2O3)
mineral
Olivine in Basalt
Peridotite / Forsterite ((Mg,Fe)2SiO4)
igneous
Yellow Quartz (Citrine or Yellow Jasper)
Silicon Dioxide (SiO2)
mineral
Amygdaloidal Basalt with Quartz/Calcite Inclusions
Amygdaloidal Basalt (SiO2 / CaCO3 inclusions)
igneous
Olivine Peridotite
Peridotite (comprising Olivine (Mg,Fe)2SiO4 and Pyroxene)
igneous
Diorite
Phaneritic intermediate plutonic rock (Diorite)
igneous
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide)
igneous
Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Greenstone / River Jadeite pebble
Metavolcanic rock / Chlorite or Actinolite-rich schist
metamorphic
Smoky Quartz (with possible Garnet inclusions)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Milky Quartz (Stained with Iron)
Silicon Dioxide (SiO2)
mineral
Orange Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Gabbro (River Cobble)
Gabbro (mafic intrusive rock)
igneous
Weathered metallic sulfide-bearing rock, possibly chalcopyrite ore
Likely chalcopyrite (CuFeS₂) in a weathered host rock; identification is uncertain from the photograph
mineral
Tektite (Indochinite)
Tektite (impactite), primarily high-silica glass (SiO2)
igneous
Greenstone / Greenschist
Greenschist (composed of Chlorite, Epidote, Actinolite)
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)
Igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Epidotite (Unakite-related Epidote)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Basalt with Olivine (Peridot)
Basalt containing (Mg,Fe)2SiO4
igneous
Hypersthene
Hypersthene (formula: (Mg,Fe)SiO3)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Ferruginous Quartzite
Quartzite with Hematite/Limonite inclusions (SiO2)
metamorphic
Zircon
Zircon (ZrSiO4)
Mineral
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Zircon
Zircon (Zirconium Silicate - ZrSiO4)
mineral
Amethyst (Rough)
Silicon Dioxide with iron impurities (SiO2)
mineral
Granite (weathered/river-tumbled)
Granite (Plutonic Igneous Rock)
Igneous Rock
Peridot (likely, given the color and bead form)
Olivine, variety Peridot (Mg,Fe)2SiO4
Mineral
Granite Pebble
Granite (Phaneritic Igneous Rock)
igneous
Gneiss (with Quartzite layers)
Gneissic Metamorphic Rock
metamorphic