Mineral

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

Schist

Schist

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Nephrite Jade

Nephrite

Granite

Granite (Phaneritic intrusive igneous rock)

Black Sand (Magnetite/Heavy Mineral Concentrate)

Magnetite-rich Placers (Fe3O4)

Fluorite

Calcium Fluoride (CaF2)

Blue Apatite

Calcium Fluorophosphate - Ca5(PO4)3F

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Biotite Schist

Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Fluorite

Calcium Fluoride (CaF2)

Granite with Epidote

Granite, containing quartz, feldspar, and epidote

Granite

Phaneritic Plutonic Felsic Rock

Orthoclase Feldspar with Quartz

Orthoclase (KAlSi3O8)

Yooperlite (Sodalite-bearing Syenite)

Sodalite-rich Syenite

Fluorite

Calcium Fluoride (CaF2)

Pink Granite Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss with Quartz Veining

Gneiss (High-grade Metamorphic Rock)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Sandstone

Sandstone (composed primarily of sand-sized minerals or rock grains)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Banded Gneiss (Variety of Gneiss)

Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Potassium Feldspar (Orthoclase)

KAlSi3O8 (Potassium Aluminum Silicate)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Shale

Shale (clastic sedimentary rock)

Basalt with Secondary Mineralization (Likely Zeolites or Calcite)

Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)

Granitic Gneiss

Gneiss (Metamorphic Rock)

Fluorite

Calcium Fluoride (CaF2)

Apatite

Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

Gneiss

Gneiss