Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
sedimentary
Category
Industrial By Product
Browse industrial by product specimens identified by the Rock Identifier community.
Yellow Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Parti Sapphire
Corundum (Al2O3)
mineral
Aquamarine (Pale variety)
Beryl (Be3Al2Si6O18)
mineral
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Milky Quartz (Crystal Cluster)
Silicon Dioxide (SiO2) - Quartz Variety
mineral
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Chert (Chalcedony/Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
mineral
Quartz (Beach Pebble)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO₂)
mineral
Chalcedony (Botryoidal/Drusy Quartz)
Silicon Dioxide (SiO₂)
Mineral
Quartz with Mica (Micaceous Quartz)
Silicon Dioxide (SiO2) with Phyllosilicates
igneous/metamorphic
Black Tourmaline (Schorl)
Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Blue Sapphire (in a faceted jewelry setting)
Corundum (Al2O3) with trace Iron and Titanium
mineral
Granitic Pegmatite
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)
Igneous
Marble
Metamorphosed Limestone (calcite formulation CaCO3)
metamorphic
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Silver (Native Silver)
Native Silver (Ag)
mineral
Banded Calcite (often sold as 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Granitic Pegmatite with Biotite
Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)
igneous
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
mineral
River Pebble (Likely Quartzite or Chalcedony)
Silicon Dioxide (SiO2) - granular metamorphic variety
metamorphic
Schist
Mica Schist
metamorphic
Diamond (Princess Cut Faceted Gemstone)
Native Carbon (C)
mineral
Chert (Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Sodalite
Sodalite - Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Raw Emerald
Beryl (Be3Al2(SiO3)6) with Cr/V impurities
mineral
Milky Quartz (Beach Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Agate (specifically a Thunderegg/Agate Nodule)
Cryptocrystalline Quartz (SiO2)
mineral
Green Moonstone (Garnierite)
Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)
mineral
Coal (likely Bituminous or Lignite)
Organic Sedimentary Rock (Carbonaceous)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Diamond
Diamond (Pure Carbon, C)
mineral