Black Star Diopside
Diopside (CaMgSi2O6) with Magnetite inclusions
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.
Basalt
Extrusive mafic igneous rock
igneous
Chert (and/or Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Obsidian
Volcanic Glass (Amorphous Silicon Dioxide, SiO2)
igneous
Basalt
Extrusive mafic igneous rock
igneous
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Amazonite
Amazonite (KAlSi3O8 – a variety of Microcline, a Potassium Feldspar)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
mineral
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Strawberry Quartz (Lepidocrosite/Hematite-Included Quartz)
Quartz (Silicon Dioxide) with Lepidocrosite or Hematite inclusions (SiO2 + Fe2O3 · nH2O)
mineral
Labradorite (Larvikite variety)
Ternary feldspar (Anorthoclase), (Na,K)AlSi3O8
igneous
Basalt
Extrusive mafic igneous rock
igneous
Aventurine (likely Green Aventurine)
Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)
Mineral/Metamorphic Rock
Banded Agate (variety of Chalcedony)
Agate (SiO2)
mineral
Chalcedony (Common Agate)
Silicon Dioxide (SiO2)
mineral
Basalt Beach Pebble
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) - Variety of Chalcedony/Quartz
mineral
Vesicular Basalt
Basalt (principally Plagioclase and Pyroxene)
igneous
Pumice
Pumiceous rhyolite
igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Chert (Nodule)
Chert (composition: SiO2)
sedimentary
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz)
sedimentary
Yellow Quartz (Citrine type/Tumbled Quartz)
Silicon Dioxide (SiO2)
mineral
Basalt (Polished)
Extrusive mafic igneous rock
igneous
Chert (Nodular Chert)
Microcrystalline Silica (SiO2)
sedimentary
Quartz (possibly Citrine or Smoky Quartz variety)
Silicon Dioxide (SiO2)
mineral
Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Quartz-veined Schist (or Metasandstone)
Metamorphic Rock with Quartz Veining (SiO2)
metamorphic
Quartzite
Metamorphic Quartz (SiO2)
metamorphic
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Smoky Quartz
Smoky Quartz (SiO ₂)
Mineral
Yellow Jade (Yellow Chalcedony/Quartz)
Silicon Dioxide (SiO2)
mineral
Halite (Rock Salt)
Halite (NaCl)
mineral
Chert Pebble with Quartz Veins
Microcrystalline Quartz (SiO2)
sedimentary
Quartz with Iron Stains
Quartz (SiO2) with iron oxide/hydroxide staining
Mineral
Bauxite
Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))
sedimentary
Graphic Granite
Graphic Granite (a variety of Pegmatite)
igneous
Vesicular Basalt (Scoria)
Vesicular Basalt
igneous
Carnelian Agate
Carnelian (Silicon Dioxide - SiO2)
mineral
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)