Quartz Crystal Point
Silicon Dioxide (SiO2)
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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Quartz
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Porphyritic Igneous Rock / Rhyolite Porphyry
Porphyritic volcanic rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Dendritic Opal
Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions
mineral
Granite
Granite
igneous
Vesicular Basalt (or Scoria)
Basalt (Aphanitic-Vesicular Mafic Igneous Rock)
igneous
Smoky Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Greenstone / Epidosite
Epidosite (Metasomatic rock consisting mainly of Epidite Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH) and Quartz)
metamorphic
Basalt (Greenstone)
Basalt with chlorite/epidote (often referred to as Greenstone)
igneous
Greenschist (containing Epidote and Quartz)
Greenschist (Epidote-Chlorite-Actinolite Schist)
metamorphic
Greenstone / Graywacke
Metagraywacke (Chlorite-grade schistose rock)
metamorphic
Kimberlite
Ultramafic igneous rock
igneous
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt
Basalt (Mafic Extrusive)
igneous
Blue Quartz (specifically Dumortierite Quartz)
Silicon Dioxide (SiO2) with inclusions of Dumortierite (Al7BO3(SiO4)3O3)
metamorphic
Granite (Weathered)
Granite (Felsic Plutonic Rock)
igneous
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Mineral, Sediment
Scoria (Red Lava Rock)
Scoria (Extrusive Igneous Rock)
Igneous
Pegmatite (likely Granitic Pegmatite)
Pegmatite (a coarse-grained igneous rock, often with granitic composition)
igneous
Greenstone or Epidote-rich rock
Epidote or Chlorite schist/greenstone
metamorphic
Variscite in Matrix
Variscite (AlPO4 · 2H2O)
mineral
Pink Granite
Granite (Phaneritic Quartz-Feldspar Rock)
igneous
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Green Andesite (or Greenstone / Altered Volcanic Rock)
Intermediate Volcanic Rock with Chlorite/Epidote Alteration
igneous
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Porphyritic Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Granite River Cobble
Phaneritic Felsic Igneous Rock
igneous
Black Beach Pebble (Basalt / Slate Pebble)
Rounded Fine-Grained Clastic / Igneous Rock Pebble
sedimentary
Yellow Sapphire
Corundum (Al2O3) with iron impurities
mineral
Basalt
Extrusive Igneous Rock
igneous
Quartz with Sericite and Cinnabar
Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)
mineral
Pink Sapphire
Corundum (Al2O3 with trace Chromium and Iron)
mineral
Quartz
Quartz (SiO₂)
Mineral
Peridot and Citrine Gemstones (in a ring setting)
Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Granitic Pegmatite
Granite Pegmatite (coarse-grained intrusive igneous rock)
igneous