Tumbled Agate
Silicon Dioxide (Chalcedony variety), SiO2
mineral
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
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Agate
Silicon Dioxide (Quartz), SiO2
mineral
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Yellow Agate
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Milky Quartz in Epidote Host Rock
Crystalline Silicon Dioxide (SiO2) with Epidote Ca2(Al,Fe)3(SiO4)3(OH)
mineral
Vuggy Quartz / Chert
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Basalt
Extrusive mafic igneous rock
igneous
Granite (weathered/river-tumbled)
Granite (Plutonic Igneous Rock)
Igneous Rock
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Tumbled sodalite (probable)
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue-dyed jasper or lapis lazuli
mineral
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Labradorite
(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
Mineral
Sodalite (blue beads) and Clear Quartz (clear beads)
Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Calcite (Yellow/Orange variety - sometimes called Honey Calcite)
Calcite
Mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Jasper mix in host rock)
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
mineral
Pegmatite
Coarse-grained Igneous Rock (Granitic Pegmatite)
igneous
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Chert (Iron-Stained)
Chert (Silicon Dioxide, SiO2)
sedimentary
Basalt
Mafic Igneous Rock
igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Basalt with minor mineral crusting
Sideromelane / Extrusive Igneous Rock
igneous
Graphite
Graphite (Carbon, C)
mineral
Garnet
Almandine-Pyrope group, X3Y2(SiO4)3
mineral
Quartz with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
mineral
Garnet (Almandine-Pyrope)
Almandine-Pyrope Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3
mineral
Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral