Mineral (Biogenic)

Turquoise in Matrix

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Chrysocolla in Matrix

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Silicate/Secondary Copper Mineral)

Vanadinite on Barite

Pb5(VO4)3Cl (Vanadinite) with BaSO4 (Barite)

Limonite (Ironstone Concretion)

Limonite (FeO(OH)·nH2O)

Limonite Concretion (Ironstone)

Limonite / Goethite (FeO(OH)·nH2O)

Limonite (Ironstone Concretion)

Limonite (Hydrous Ferric Oxides mixed with Goethite)

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Limonite (with goethite)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Limonite Concretion (Ironstone)

Limonite (FeO(OH)·nH2O) / Goethite

Limonite (Gozzany Iron)

Limonite (FeO(OH)·nH2O)

Bauxite

Bauxite (Al(OH)3, γ-AlO(OH), and α-AlO(OH))

Limonite (Iron Ore)

Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O

Scoria with Calcite Infills

Vesicular Basalt with secondary Calcification (CaCO3)

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2)

Smoky Quartz

Silicon dioxide (SiO2)

Herkimer Diamond

Quartz (Silicon Dioxide, SiO2)

Larimar

Blue Pectolite (NaCa2Si3O8(OH))

Blue Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Quartz with inclusions (likely Tourmaline or Biotite)

Silicon Dioxide (SiO2)

Magnetite or Magnetic Iron Ore

Magnetite (Fe3O4)

Lapis Lazuli

Sodium aluminum silicate with sulfur (main component: Lazurite [(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2])

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz / Quartzite

Silicon Dioxide (SiO2)

Limonite with Opal infusion

FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)

Gold in Matrix

Native Gold (Au)

Limonite (also known as Yellow Ochre or Brown Hematite)

Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)

Fossilized Bone Fragment

Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)

Pyrite-rich Ore

Pyrite (FeS2) with secondary minerals

Pegmatite with Schorl (Black Tourmaline) and Mica

Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)

Milky Quartz (with Chlorite/Mineral Inclusions)

Silicon Dioxide (SiO2)

Gossan (Iron Hat)

Limonitic Gossan (predominantly FeO(OH)·nH2O)

Granite (Thin Section)

Granite (Felsic Plutonic Rock)

Fluorite

Calcium Fluoride (CaF2)

Biotite Schist (likely)

Biotite Schist (rock), Biotite (mineral)

Schist with Quartz Veins

Schist with Quartz (SiO2)

Native Copper

Native Copper (Cu)

Quartz Pebble (with Iron Inclusions)

Silicon Dioxide (SiO2)

Fluorite Geode

Calcium Fluoride (CaF2)

Chalcedony (Botryoidal Agate vein)

Chalcedony (Microcrystalline Quartz) - SiO2

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Sandstone Concretion (Omar or Nut Rock)

Sedimentary Concretion (specifically an 'Omarolluk' or Omar)