Mineral (Variety Of Chalcedony)

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Travertine (Calcareous Tufa)

Calcium Carbonate (CaCO3)

Muscovite Mica

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

Ferruginous Sandstone

Arenite with Iron-Oxide cement (Fe2O3 · nH2O)

Yellow Aventurine

Quartzite with inclusions (SiO2)

Limonitic Scoria (Vesicular Basalt with Iron Staining)

Highly vesicular basalt heavily stained by Limonite [FeO(OH)·nH2O]

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

K2 Jasper (Beads)

Granodiorite with Azurite and Malachite

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Rough Garnet (likely Almandine or Pyrope)

Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3

Rose Quartz

Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Rose Quartz

Silicon Dioxide with traces of Titanium, Iron, or Manganese (SiO2)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Labradorite

Feldspar (variety of Anorthite), (Ca,Na)(Al,Si)4O8

Tanzanite

Blue/Violet Variety of Zoisite (Ca2Al3(SiO4)3(OH))

Chert (Septarian or Nodular variety)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Strawberry Quartz

Quartz (SiO2) with inclusions of Goethite or Hematite

Smoky Quartz

Quartz (SiO₂)

Quartzite with Gneissic Banding

Quartzite (primarily SiO2) with mafic mineral inclusions

Granitic Pegmatite with Schorl

Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Bi-Color Tourmaline (or Watermelon Tourmaline)

Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)

Granite

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Peridot

Olivine ((Mg,Fe)2SiO4)

Chert (and Jasper/Flint variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Orbicular Granite (specifically Mustard or Yellow Tonalite/Granodiorite)

Orbicular Quartz Diorite / Tonalite

Green Banded Chert (Agate/Jasper)

Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite

Granite

Phaneritic Granitoid (Primary minerals: Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Mica)

Orange Calcite

Calcium Carbonate (CaCO3)

Amethyst (specifically Chevron Amethyst or Dream Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)

Quartz (likely) or a Quartzite Pebble

Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Rutilated Quartz

SiO2 (Quartz) with TiO2 (Rutile inclusions)

Peridot (likely, based on color and appearance)

Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)

Granite (Pink/Red variety)

Phaneritic Felsic Intrusive Igneous Rock (composed primarily of Quartz, K-Feldspar, and Plagioclase)