Rutilated Quartz
Quartz (SiO2) with Rutile inclusions (TiO2)
Mineral
Category
Mineral (Man Made Glass, Not Natural)
Browse mineral (man made glass, not natural) specimens identified by the Rock Identifier community.
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Granite
Felsic intrusive igneous rock
igneous
Amethyst
Silicon Dioxide (SiO2) with trace Iron (Fe) impurities
mineral
Granite
Felsic intrusive igneous rock
igneous
Desert Rose (Gypsum Rose)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Ruby
Corundum (Al2O3 with Chromium trace)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Heart-shaped Jasper / Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Flint / Chert Nodule
Microcrystalline quartz (SiO2)
sedimentary
Quartzite Pebble
Quartzite
metamorphic
Chert (Yellow Jasper)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Pink Dyed Agate
Silicon Dioxide (SiO2) - Variety Agate
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions (Quartzite)
metamorphic
Pink Quartz (likely dyed)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper / Quartz pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2) - Ferric Iron impurities
mineral
Granite
Granite (a phaneritic intrusive igneous rock)
igneous
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Green Aventurine
Quartzite with Fuchsite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions, SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Green Aventurine (Fuchsite-bearing Quartzite)
Silicon Dioxide (SiO2) with Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Golden Healer Quartz
Ferruginous Quartz (SiO2 with Fe2O3 inclusions)
mineral
Emerald in Matrix
Beryl (Be3Al2(SiO3)6) embedded in schist or pegmatite host rock
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Chert (specifically Dark Chert or Flint)
Silicon dioxide (SiO2)
sedimentary
Jasper and Agate Beads (Mahogany Obsidian, Dyed Agate, Turquoise/African Turquoise)
Silicon Dioxide (SiO2) mixture with inclusions / Hydrated Copper Aluminum Phosphate
gemstone
Amethyst
Silicon Dioxide (SiO2 with iron impurities)
gemstone
Mica Schist
Mica Schist (principally Biotite/Muscovite, Quartz, and Feldspar)
metamorphic
Limonite Nugget
Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Fossilized Shark Tooth (Eroded)
Carcharodon sp. or Otodus sp. fragment (likely)
fossil
Citrine Geode (or Druzy Citrine)
Silicon Dioxide (SiO₂) - a variety of Quartz
Mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Granite
Granite (Plutonic Igneous Rock)
igneous
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Weathered quartz-rich rock, possibly chert or quartzite fragment
Indeterminate; likely microcrystalline quartz (SiO₂), possibly with iron-oxide staining
metamorphic
Carnelian Agate
SiO2 (Silicon Dioxide - Chalcedony variant)
gemstone
Quartzite
Quartzite (SiO2)
metamorphic
Prasiolite and Quartz Crystal Cluster
Quartz (SiO2); Prasiolite is a variety of Quartz
mineral
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary