Igneous, Sedimentary, Or Metamorphic (Mineral Based)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Quartz (Milky or Rough Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Gold

Native Gold (Au)

Quartz (Milky or Druzy Quartz)

Silicon Dioxide (SiO2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Mica (specimen appears to be Muscovite or Phlogopite)

Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneissic Metamorphic Rock

Fossilized Coral (Petoskey-style)

Hexagonaria percarinata (Fossilized Rugose Coral)

Gneiss (specifically Amphibolite Gneiss)

Gneiss

Gneiss

High-grade metamorphic rock (Gneiss)

Conglomerate

Conglomerate (clastic sedimentary rock)

Gneiss

High-grade metamorphic rock (Gneiss)

Conglomerate

Conglomerate (SiO2, Al2O3, Fe2O3, CaCo3)

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Greenschist

Chlorite schist

Blue Calcite

Calcium Carbonate (CaCO3)

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Chert (specifically Yellow/Common Opal or Jasper mixture)

Silicon Dioxide (SiO2)

Blue Moss Agate

Silicon Dioxide (SiO2) with mineral inclusions

Gneiss

High-grade regional metamorphic rock (Foliated)

Gneiss

Gneiss

Tourmaline (likely Schorl)

Tourmaline Group Mineral (e.g., Schorl for black varieties); (Na,Ca)(Li,Mg,Fe,Mn,Al)3Al6(BO3)3Si6O18(OH)4

Schist with Biotite and Quartz

Biotite-Quartz Schist (Fe,Mg,Al silicate mix)

Pyrite (on a metal substrate)

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Fossilized Coral (Petoskey Stone or similar)

Hexagonaria percarinata (Fossilized Rugose Coral)

Conglomerate

Clastic Conglomerate (Lithic-rich)

Grey River Pebble (Likely Quartz-rich or Limestone)

Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)