Sedimentary Or Metamorphic (Low Grade)

Green Fluorite

Calcium Fluoride (CaF2)

Garnet (specifically Almandine)

Almandine - Fe3Al2(SiO4)3

Carnelian

Chalcedony (SiO₂)

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Biotite Schist

Biotite Schist

Turquoise with Pyrite

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O] with Iron Pyrite (FeS2)

Chert (variations include Flint/Jasper)

Cryptocrystalline Quartz (SiO2)

Jasper (Red Jasper with Quartz veins)

Jasper (Silicon Dioxide, SiO2)

Yellow Jasper

Microcrystalline Quartz with Iron Oxide (SiO2)

Pyrite

Pyrite (Iron Disulfide), FeS2

Biotite Mica

K(Mg, Fe)3AlSi3O10(F, OH)2

Galena

Lead Sulfide (PbS)

Quartz (Milky/Rose Quartz variety)

Silicon Dioxide (SiO2)

Specular Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Yellow Calcite

Calcium Carbonate (CaCO3)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Green Calcite

Calcium Carbonate (CaCO3)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Almandine Garnet

Almandine (Fe3Al2Si3O12)

Pyrite

Iron Disulfide (FeS2)

Quartz (Milky or White Quartz)

Silicon Dioxide (SiO2)

Muscovite Mica (with Schist)

Muscovite - KAl2(AlSi3O10)(OH)2

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Limestone

Calcium Carbonate (CaCO3)

Quartzite (clastic/metamorphic subtype)

Quartzite (primarily Silicon Dioxide, SiO2)

Carnelian

Carnelian (variety of Chalcedony, SiO2)

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Yellow Calcite

Calcium Carbonate (CaCO3)

Pink Garnet (likely Almandine or Rhodolite)

Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)

Pink Opal / Peruvian Opal

Hydrated amorphous silicon dioxide (SiO2·nH2O)

Kidney Stone (Renal Calculus)

Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O

Barite Rose (Desert Rose)

Barium Sulfate (BaSO4)

Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)

Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Ocean Jasper

Silicon Dioxide (SiO2) with various inclusions

Turquoise (Rough Specimens)

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

Tiger's Eye

Tiger's Eye (a variety of Quartz, SiO₂)