Quartzite
Quartzite (principally SiO2)
metamorphic
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
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Pumice (specifically a water-worn, weathered variety)
Vesicular volcanic glass
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Fossilized turtle shell fragment
Testudines indeterminate; shell bone permineralized with silica/carbonate minerals
fossil
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
mineral
Chert (Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz with Tourmaline and Iron Oxides
Silicon Dioxide (SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Included Quartz Beads (likely Phantom Quartz or Garden Quartz)
Quartz (SiO2) with various mineral inclusions
Mineral
White Quartz Star-cut crystal
Silicon Dioxide (SiO2)
mineral
River Quartzite / Tumble-Polished Quartz
Quartzite (SiO2)
metamorphic
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3)
sedimentary
Green Tourmaline
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Pink Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Mudstone
Argillite / Siliciclastic sedimentary rock
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
![Sodium Polyacrylate (Superabsorbent Polymer) (Sodium Polyacrylate [-CH2-CH(COONa)-]n) — mineral (synthetic)](https://media.rockidentification.com/826c0c25-9fc0-4529-9425-5fa125f2a82f-thumbnail.jpg)
Sodium Polyacrylate (Superabsorbent Polymer)
Sodium Polyacrylate [-CH2-CH(COONa)-]n
mineral (synthetic)
Shale fragment
Shale (clay mineral rich sedimentary rock)
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
River Cobble (Weathered Granitoid)
Granodiorite / Quartz Diorite
igneous
Fluorite
Calcium fluoride (CaF2)
mineral
Olivine (Peridot when gem-quality)
Magnesium Iron Silicate, (Mg,Fe)2SiO4
Mineral
Botryoidal Chalcedony
Chalcedony (SiO2)
Mineral
Sandstone Pebble
Quartz Sandstone
sedimentary
Desert Rose
Gypsum (variety Selenite) or Barite: CaSO4 · 2H2O
mineral
Polished brecciated jasper
Jasper, opaque microcrystalline quartz (SiO₂), with iron-oxide and other mineral inclusions
gemstone
Obsidian (likely snowflake-free black volcanic glass)
Volcanic glass; predominantly rhyolitic silica melt (SiO₂-rich, noncrystalline)
igneous
Basalt
Basalt (containing Pyroxene and Plagioclase Feldspar)
igneous
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Weathered quartz-rich stone, possibly chalcedony or calcite
Likely microcrystalline quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing
mineral
Lepidolite
K(Li,Al)_3(Si,Al)_4O_10(F,OH)_2 (Lithium-bearing Mica)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
gemstone
Likely weathered iron-rich meteorite
Unclassified stony-iron or iron meteorite candidate; confirmation requires laboratory testing
meteorite
Veined Pebble (likely a Quartz-Veined Pebble)
Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)
Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Gold Ore in Quartz
Auriferous Quartz (SiO2 with Au inclusions)
mineral