Mineral (Native Element Alloy)

Granite

Granite (Phaneritic Quartz-Feldspar Plutonic Rock)

Milky Quartz with Mineral Inclusions

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Coquina / Shelly Limestone

Coquina (calcium carbonate, CaCO3)

Blue Calcite

Calcium Carbonate (CaCO3)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Blue Apatite

Apatite - Ca5(PO4)3(F,Cl,OH) (Calcium phosphate with Fluorine, Chlorine, or Hydroxyl)

Dyed Agate

Silicon Dioxide (SiO2)

Dyed Agate

Silicon Dioxide (SiO2) with synthetic dyes

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (typically quartz, feldspar, mica, amphibole composition)

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Fluorite (Rainbow, Purple-Blue Tumbled)

Calcium Fluoride (CaF2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Coquina

Biogenic Limestone (Calcite/Aragonite base, CaCO3)

Not a rock, mineral, or geological specimen

Muscovite Mica

Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2

Garden Quartz (Lodalite)

Silicon Dioxide with various mineral inclusions (SiO2)

Gneiss (Cobble)

Gneiss

Limestone with Quartz/Calcite Veins

Sedimentary Limestone (CaCO3 with SiO2 or CaCO3 intrusions)

Fluorite Tower

Fluorite (Calcium Fluoride - CaF2)

Schist

Schist (various mineral compositions)

Sandstone (with Limonite staining)

Arenite (primarily SiO2 with FeO(OH)·nH2O)

Granite Gneiss

Gneiss (high-grade metamorphic rock)

Granatic Pegmatite

Pegmatitic Granite

Granitic Pegmatite

Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)

Sandstone (likely Arkosic or Lithic)

Clastic Sedimentary Rock (SiO2 with accessory minerals)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Diorite

Diorite (Intermediate intrusive igneous rock)

Granite

Granite (Felsic Plutonic Rock)

Granitic Pegmatite (Muscovite and Quartz)

Pegmatite (KAl2(AlSi3O10)(OH)2 / SiO2)

Turquoise

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

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Diorite

Diorite (Intermediate intrusive igneous rock)

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss

Gneiss (high-grade metamorphic rock)

Wallboard/Drywall (Gypsum-based)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Banded Calcite (often sold as 'Mexican Onyx' or 'Calcite Onyx')

Calcite (Calcium Carbonate, CaCO3)