Minerals

Shattuckite (Blue Quartz/Jasper Matrix)

Shattuckite (Copper Silicate Hydroxide - Cu5(SiO3)4(OH)2)

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

Almandine Garnet in Schist Matrix

Almandine - Fe3Al2(SiO4)3

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Pyrite

Iron Disulfide (FeS2)

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)

Turquoise

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

Kidney Stone

Calcium Oxalate (CaC2O4·nH2O)

Sulfur on Quartz

Native Sulfur (S8) with Quartz (SiO2)

Azurite

Azurite (Cu3(CO3)2(OH)2)

Granitic Pegmatite with Tourmaline/Chlorite

Pegmatite

Limonite after Marcasite (Propeller Conchoid)

Goethite/Limonite pseudomorph after Marcasite (FeO(OH)·nH2O)

Rhodochrosite

Manganese Carbonate (MnCO3)

Bornite

Bornite (Cu5FeS4)

Quartz

Silicon Dioxide (SiO2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Fairy Stone (Menilite Concretion)

Carbonate-rich concretion (often Siderite or Calcite in Clay)

Glauconitic Sandstone

Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Potassium-Rich Silicate Clay (inferred from biological context)

Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Bumble Bee Jasper

Calcite and Volcanic Ash Mixture

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4

Gold

Native Gold (Au)

Chert (Iron-stained)

Silicon Dioxide (SiO2)

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)

Tree Agate

Silica (SiO2) with Chlorite inclusions

Chert

Silicon dioxide (SiO2)

Chert (Jasper/Agate variety)

Silicon Dioxide (SiO2)

White Marble

Recrystallized Calcite (CaCO3)

Hematite (Oolitic or Earthy variety)

Iron(III) oxide (Fe2O3)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Marble

Recrystallized Calcite / Dolomite (CaCO3)

Silver (Native Element)

Ag (Argentum) - 90% Silver, 10% Copper alloy in specimen

Limonite and Hematite Gossan

Hydrated Iron Oxide Mix (FeO(OH)·nH2O) / Ferric oxide (Fe2O3)

Geode (Unopened)

Siliceous Concretion / Geode

Marble (Calcitic)

Metamorphosed Limestone (CaCO3)

Goethite

Goethite (FeO(OH))

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Hematite

Iron(III) oxide (Fe2O3)

Zebra Marble

Metamorphosed Limestone (Recrystallized Calcite)