Metamorphic And Mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

White Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Raw Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Clear Quartz)

Silicon Dioxide (SiO2)

Quartz (Smoky/Grey variety)

Silicon Dioxide (SiO2)

Likely quartz-rich rock fragment

Quartz (silicon dioxide, SiO₂), possibly milky quartz or a quartz-bearing stone

Tumbled Quartz

Silicon Dioxide (SiO2)

Tumbled black tourmaline

Schorl tourmaline, NaFe3Al6(BO3)3Si6O18(OH)4

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide (SiO2) with inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Natural gemstone and mineral collection

Mixed specimens, including turquoise, tiger’s eye, amethyst, fluorite, pyrite, garnet, rose quartz, lapis lazuli, obsidian, rhodonite, red corundum, labradorite, calcite, lepidolite, sodalite, apatite, and others

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Possibly raw hematite or magnetite

Hematite (Fe₂O₃) or magnetite (Fe₃O₄)

Mixed polished and tumbled mineral specimens, prominently amethyst

Amethyst: purple quartz, SiO₂; accompanying pieces may include jasper, agate, aventurine, tiger’s eye, and other lapidary stones

Rough Diamond (or Quartz Crystal)

Carbon (C) [if Diamond] / Silicon Dioxide (SiO2) [if Quartz]

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Magnetite / Iron Ore

Magnetite (Fe3O4)

Mixed tumbled rock and mineral collection

Varied specimens, including probable quartz varieties, jasper, agate, fluorite, rose quartz, amethyst, pyrite, calcite, and others

Mixed mineral and rock specimen collection

Mixed assemblage, visibly including quartz, chalcedony/agate, feldspar, mica, dark mafic rocks, and possibly calcite or gypsum

Nephrite Jade

Nephrite

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Quartz Vein)

Silicon Dioxide (SiO2)

Pyrite (Iron Pyrite)

Iron Sulfide (FeS2)

Epidote

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

Epidote

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Epidote

Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Blue Apatite

Calcium Fluorophosphate - Ca5(PO4)3F

Magnetite (Lodestone)

Magnetite (Fe3O4)

Rhodonite

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

Epidote

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

Rhodonite

(Mn,Fe,Mg,Ca)SiO3

Greenschist

Chlorite Schist

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)

Gneiss with Quartz Vein

Metamorphic Gneiss