Mineral Side Rock

Milky quartz (likely quartz crystal fragment)

Quartz, silicon dioxide (SiO₂)

Clear Quartz

Silicon Dioxide (SiO2)

Garnet Schist

Garnetiferous Mica Schist

Amethyst

Amethyst (Silicon Dioxide - SiO2 with impurities of iron)

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (Mineralized Apatite / Bio-apatite)

Clear Quartz

Silicon dioxide (SiO2)

Smoky quartz crystal cluster

Quartz, silicon dioxide (SiO₂), likely smoky quartz with milky quartz matrix

Iron Ore / Ironstone Concretion

Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.

Petoskey Stone (Fossilized Coral)

Hexagonaria percarinata

Clear Quartz

Silicon Dioxide (SiO2)

Garnet

Silicate mineral group (often Pyrope or Almandine in this color range)

Petoskey Stone (Fossilized Coral)

Hexagonaria percarinata

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂)

Clear quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Quartz Crystal (Smoky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst

SiO2 (Silicon Dioxide with iron impurities)

Citrine (Heat-treated Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Quartz

Silicon Dioxide (SiO₂)

Milky quartz

Quartz, silicon dioxide (SiO₂)

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Quartz crystal (likely milky or clear quartz)

Quartz, silicon dioxide (SiO₂)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Quartz (likely milky quartz or quartz glass-like fragment)

Quartz, silicon dioxide (SiO₂)

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂)

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Black Tourmaline (Schorl)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Fossil ammonite

Ammonoidea (likely a ribbed, involute ammonite; exact genus requires locality and preservation details)

Amethyst (Quartz)

Silicon Dioxide (SiO2) with iron impurities

Fossil Coral (Petoskey Stone / Rugose Coral)

Hexagonaria percarinata (Order: Rugosa, Fossilized Calcium Carbonate CaCO3)

Quartz crystal fragment

Quartz, silicon dioxide (SiO₂)

Quartz crystal cluster (likely hematoid/iron-stained quartz)

Quartz, silicon dioxide (SiO₂), with iron-oxide staining and possible chalcedony/microcrystalline matrix

Clear Quartz Point

Silicon Dioxide (SiO2)

Green Apophyllite

Fluorapophyllite-(K), KCa4(Si8O20)(F,OH)·8H2O

Likely quartz crystal with iron-oxide staining

Quartz (SiO₂), possibly included or coated with limonite/goethite

Quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)