Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH) (Calcium phosphate with Fluorine, Chlorine, or Hydroxyl)
mineral
Category
Industrial Byproduct (Often Mistaken For Obsidian Or Mineral)
Browse industrial byproduct (often mistaken for obsidian or mineral) specimens identified by the Rock Identifier community.
Learn about Industrial Byproduct (Often Mistaken For Obsidian Or Mineral) in the encyclopedia
View all →
Chlorite (Small Flakes/Sand)
Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
mineral
Snowflake Obsidian (Polished Cabochon)
Obsidian with Spherulitic Cristobalite (SiO2)
igneous
Diamond (likely facet or crystal shard)
Diamond (C)
mineral
Quartz vein in metamorphic rock
Crystalline Silicon Dioxide (SiO2) in Host Rock
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Cupronickel (on a 1981 Mexico 20 Pesos coin)
Copper-Nickel Alloy (Cu75Ni25)
mineral
Milky Quartz with Chlorite inclusions
Silicon Dioxide (SiO2) with Chlorite group minerals
mineral
Granitic Pegmatite with Schorl Tourmaline
Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
Granitic Pegmatite with Tourmaline/Chlorite
Pegmatite
Igneous
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Ferruginous Oxides
mineral
Jasper
Jasper (Silica/Silicon Dioxide, SiO2)
sedimentary
Basalt with Secondary Mineralization (Likely Zeolites or Calcite)
Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)
igneous
Agate Nodule / Weathered Chert
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
Sedimentary / Mineral
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Mineral
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Alm: Fe3Al2(SiO4)3
mineral
Pyrite in Quartz
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Native Copper (Penny specimen)
Native Copper (Cu)
mineral
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Gold-Bearing Quartz Ore
Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)
mineral
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Ironstone (with Limonite/Goethite)
Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O and Hematite Fe2O3)
sedimentary
Bornite
Bornite (Cu5FeS4)
mineral
Sandstone (likely Siltstone or Mudstone)
Clastic sedimentary rock (primarily SiO2 with various oxides)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Pegmatite
Coarse-grained Igneous Rock (Granitic Pegmatite)
igneous
Scoria
Vesicular Basalt / Scoriaceous Basalt
igneous
Diamond (or Cubic Zirconia)
Carbon (C) / Cubic Zirconium Dioxide (ZrO2)
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Asphalt Concrete (Bituminous Concrete)
Bituminous aggregate
sedimentary
Diamond (Round Brilliant Cut)
Diamond (Pure Carbon, C)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (specifically a water-worn river pebble)
Silicon Dioxide (SiO2)
Mineral
Agate (specifically a Thunderegg/Agate Nodule)
Cryptocrystalline Quartz (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
White Topaz
Topaz - Al2SiO4(F,OH)2
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary