Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Category
Browse igneous, sedimentary, and metamorphic mix specimens identified by the Rock Identifier community.
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
Jasper and Basalt Mix (Dark Chert/Basalt River Pebble)
Silicon Dioxide (SiO2) or Mafic extrusive igneous rock
Tiffany Stone
Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz with Inclusions
Silicon Dioxide (SiO2)
Galena
Lead Sulfide (PbS)
Clear Quartz (Faceted Crystal)
Silicon Dioxide (SiO2)
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
Quartz (Rose Quartz or Jasper variety)
Silicon Dioxide (SiO2)
Fossilized marine shell fragment
Likely a bivalve or gastropod shell preserved as calcite (CaCO₃)
Garnet (likely Almandine or a blend)
Garnet group: X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+. Given the dark, somewhat reddish-brown appearance in the image, it's likely Almandine (Fe3Al2(SiO4)3) or a mix with other iron-rich garnets.
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
Milky Quartz
Silicon dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Pallasite Meteorite (Sliced and Polished)
Pallasite (Iron-Nickel Matrix with Olivine crystals)
Citrine
Silicon dioxide (SiO2)
Apatite
Ca5(PO4)3(F,Cl,OH)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz fragment
Silicon Dioxide (SiO2)
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Chakra Stone Tower (Composite Multi-Mineral)
Crystalline Silicon Dioxide composite (SiO2) with various inclusions
River Quartz (Milky and Smoky mix)
Silicon Dioxide (SiO2)
Pyrite
Iron sulfide (FeS2)
Quartz Pebble
Silicon Dioxide (SiO2)
Asphalt (Bituminous Pavement Bit)
Bitumen-bound aggregate (Petrochemical-bound composite)
Quartz with Inclusions
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Agate
SiO2 (Chalcedony/Quartz)
Hematite
Iron Oxide (Fe2O3)
Milky Quartz
Silicon Dioxide (SiO2)
Pyrite in Matrix (Fool's Gold)
Iron Sulfide (FeS2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Sandstone (lithic wacke/conglomerate mix)
Clastic Sedimentary Rock (SiO2 with lithic fragments)