Metamorphic (Low Grade)

Quartz

Quartz (Silicon Dioxide, SiO2)

Amethyst

Quartz variety; chemical formula: SiO₂ (silicon dioxide) with Fe³⁺ impurities

Ruby in Zoisite

Ruby (α-Al2O3) embedded in Zoisite (Ca2Al3(SiO4)3(OH)) with some Hornblende

Calcite

Calcite (CaCO₃)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Amethyst (Geode Fragment)

Silicon Dioxide (SiO2 with iron impurities)

Black Star Diopside

Diopside (CaMgSi2O6) with Magnetite inclusions

Fluorite Bracelet (light green beads) and possibly Lavender Jadeite (purple bead)

Fluorite: CaF₂ (Calcium Fluoride); Jadeite: NaAlSi₂O₆ (Sodium Aluminum Silicate)

Yellow Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)

Amethyst

Quartz (SiO2) variety

Calcite

Calcite (CaCO3)

Quartz

Silicon Dioxide (SiO2)

Mica-rich Sandstone or Micaceous Schist Weathering

Micaceous Schist (Muscovite-Quartz composition)

Anthracite Coal

Anthracite (a form of coal, primarily carbon)

Blue Tiger's Eye

Riebeckite (crocidolite variety)

Serpentinite

Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)

Calcite

Calcite (CaCO3)

Pyrite

Pyrite (Iron Disulfide), FeS2

Blue Lace Agate

Chalcedony (a form of Quartz) - SiO2

Green Calcite

Calcite (CaCO3)

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Quartz with Mica/Chlorite inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Pyrite (or Fool's Gold)

Pyrite (FeS₂)

Marble

Marble (primarily Calcite, CaCO3 or Dolomite, CaMg(CO3)2)

Fluorite (likely)

Calcium Fluoride (CaF2)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Sapphire (Corundum)

Corundum (Al2O3), variety Sapphire

Banded Gneiss

Gneiss (pronounced "nice")

Serpentinite (Serpentine Rock)

Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.

River Stone / Pebble

Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)

Aquamarine

Aquamarine (Beryl variety) - Be3Al2(Si6O18)

Serpentine

Serpentine group minerals (e.g., Antigorite, Chrysotile, Lizardite). Chemical formula: (Mg, Fe)₃Si₂O₅(OH)₄

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)₈[(S,Cl,SO₄,OH)₂|(Al₆Si₆O₂₄)], with varying amounts of Calcite, Pyrite, and Sodalite.)

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Jade

Jadeite or Nephrite

Mixed Chalcedony and Jasper Bracelet (possibly 'Ocean Jasper' or similar banded variety for brown beads, and blue/grey Chalcedony for the translucent beads)

Chalcedony (SiO2), Jasper (SiO2 with impurities)

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Garnet (likely Almandine, Pyrope, or a blend)

Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

Pebble (likely Quartzite or Chert)

Clastic Sediment, potentially composed of SiO₂ (Quartz)

Ruby

Corundum (Al₂O₃) with Chromium (Cr)