Mixed (Predominantly Sedimentary And Igneous)

Amethyst

Amethyst (Silicon Dioxide - SiO2)

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Banded Agate (Botswana Agate)

Silicon Dioxide (SiO2)

Citrine (Heat-treated Amethyst)

Citrine Quartz (SiO2)

Tanzanite

Blue Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))

Slate

Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite

Metamorphic Quartzite (predominantly SiO2)

Green Aventurine

Aventurine (a variety of Quartz, SiO2 with fuchsite inclusions)

Aquamarine

Beryl (Be₃Al₂Si₆O₁₈), specifically a blue or cyan variety

Citrine Quartz

Quartz (SiO2) - specifically, a variety of macrocrystalline quartz

Magnetite (potentially Hematite-rich)

Magnetite (Fe3O4)

Magnetite Orthorthotropic Rock

Magnetite (Fe3O4)

Banded Iron Formation (BIF) / Tiger Iron variety

Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz - SiO2 + Fe2O3)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Amber

Amber (Fossilized Tree Resin)

Pyrite

Iron Sulfide (FeS2)

Caliche (also known as hardpan, calcrete, kankar)

Primarily composed of calcium carbonate (CaCO₃), often mixed with other minerals like quartz, clay minerals, and iron oxides.

Druzy Quartz

Silicon Dioxide (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Tiger's Eye

Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2

Chrysocolla in Cuprite (Sonoran Sunrise)

Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) (Chrysocolla) and Cu2O (Cuprite)

Diamond

Diamond (pure Carbon, C)

Amazonite

Microcline (variety Amazonite) - K(AlSi3O8)

Turquoise (Blue Howlite imitation)

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

Dendritic Opal (Merlinite)

Hydrated Silica with Manganese/Iron oxide inclusions (SiO2·nH2O)

Amethyst

SiO2 (Silicon Dioxide with Iron impurities)

Blue Apatite

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

Pyrite

Iron Sulfide (FeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz (Milky/Common Quartz)

Silicon Dioxide (SiO2)

Tiger's Eye

Silicon Dioxide (SiO2) with iron oxide inclusions

Pyrite in Matrix (Fool's Gold)

Iron Sulfide (FeS2)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxide

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)