Igneous, Sedimentary, Metamorphic, Mineral, Gemstone, Fossil, Or Meteorite

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Fossil Coral

Phylum Cnidaria / Rugosa or Tabulata

Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Pyrite

Iron Disulfide (FeS2)

Weathered iron-rich concretion or ironstone cobble

Limonite/goethite-rich ironstone, commonly with hematite and quartz

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz (Pink / Ferruginous)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Peridot

Olivine ((Mg, Fe)2SiO4)

Ironstone Concretion / Hematite Nodules

Ferruginous Sedimentary Rock (primarily Hematite Fe2O3 and Goethite FeO(OH))

Blue Apatite

Fluoroapatite (Ca5(PO4)3F)

Calcite

Calcium Carbonate (CaCO3)

Chert Nodule / Ironstone Concretion

Microcrystalline Quartz (SiO2) with Iron Oxides

Pallasite Meteorite

Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)

Quartz (Milky Variant)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Smoky Quartz)

Silicon Dioxide (SiO2)

Blue Apatite

Calcium phosphate mineral, Ca5(PO4)3(F,Cl,OH)

Olivine (Peridot)

(Mg,Fe)2SiO4

Olivine (Peridot)

(Mg,Fe)2SiO4

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Garnet

Garnet (X3Y2(SiO4)3)

Quartz

Silicon Dioxide (SiO2)

Tektite (Indochinite)

Tektite (High-silica natural glass)