Sandstone
Arenite (SiO2 based)
sedimentary
Category
Sedimentary Like (Industrial Composite)
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
Included Quartz Beads (likely Phantom Quartz or Garden Quartz)
Quartz (SiO2) with various mineral inclusions
Mineral
Granite
Plutonic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Ferruginous Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions (Fe2O3)
mineral
Almandine Garnet in Schist Matrix
Almandine - Fe3Al2(SiO4)3
metamorphic
Epidote
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
mineral
Banded Agate (Pink Chalcedony)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Quartz (variety of colors)
SiO2 (Silicon Dioxide)
Mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins)
Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)
igneous or sedimentary
Honey Calcite (Yellow Calcite)
Calcium Carbonate (CaCO3)
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Epidote in Basalt
Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)
igneous
Red Garnet
Garnet Group (e.g., Pyrope, Almandine, Spessartine, Grossular, Andradite, Uvarovite)
Mineral
Fluorite (left), Sodalite (middle), Dumortierite/Tumbled Quartzite (right)
Calcium Fluoride (CaF2), Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2), Aluminum Borosilicate (Al7(BO3)(SiO4)3O3)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Dyed Quartz (often sold as 'Blue Quartz' or 'Blue Agate')
Silicon Dioxide (SiO2) with artificial pigment
mineral
Peridotite (with Olivine)
Peridotite (rich in Olivine, (Mg,Fe)2SiO4)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony
Chalcedony (SiO2)
Mineral
Orange Quartzite (River Pebble)
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Schist (Garnet-Mica Schist)
Garnet-Mica Schist
metamorphic
Rough Aquamarine
Beryl (Be₃Al₂Si₆O‑₁₈)
mineral
Diamond (in jewelry)
Cubic Carbon (C)
mineral
Native Copper Nugget
Native Copper (Cu)
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Quartz (Tumbled/Polished Pebble)
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
Mineral
Sulfur (in host rock)
Native Sulfur (S8)
mineral
Copper Ore (likely Chalcopyrite in Matrix)
Chalcopyrite (CuFeS2)
mineral
Granitic Pegmatite
Pegmatite containing Quartz, Feldspar, and Muscovite mica
igneous
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Massive Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Corundum (Sapphire variant)
Aluminium oxide (Al2O3)
mineral
Corundum (Ruby variety)
Aluminium oxide (Al2O3)
mineral
Pink Garnet in Matrix
Grossular or Almandine Garnet (X3Y2(SiO4)3)
metamorphic
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Red Slag Glass
Amorphous Silica (Industrial byproduct with metallic oxide dopants)
Mineraloid / Industrial Byproduct
Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)
mineral