Mineral (Specifically A Gemstone Variety)

Red Garnet (Pyrope or Almandine)

Magnesium aluminum silicate (Mg3Al2(SiO4)3) or Iron aluminum silicate (Fe3Al2(SiO4)3)

Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Obsidian

Obsidian (Volcanic Glass)

Jasper with Iron Staining

Silicon Dioxide (SiO2) with impurities

Banded Agate (specifically Mexican Lace Agate variety appearance)

Silicon Dioxide (SiO2 / Chalcedony)

Banded Agate (specifically Moss Agate or Plume Agate variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Aquamarine

Aquamarine (Beryl variety) - Be3Al2(Si6O18)

Amazonite

KAlSi3O8 (Potassium Feldspar, variety of Microcline)

Granite

Granite (Felsic Plutonic Rock)

Mixed Gemstone Beaded Jewelry

Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)

Amethyst

SiO2 (Silicon Dioxide)

Bivalve Fossil (Internal Mold/Steinkern)

Class Bivalvia (Fossilized Mold)

Green Calcite

Calcium Carbonate (CaCO3)

Bloodstone (Heliotrope)

Chalcedony (SiO2) with inclusions of Iron Oxide or Red Jasper

Charoite

Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)

Ironstone Concretion (Moqui Marble)

Iron-oxide Concretion (Hydrated ferric oxide, Fe2O3·nH2O)

Green Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Orange Calcite (Carved as a Horned Skull)

Calcium Carbonate (CaCO3)

Moss Agate

Chalcedony (Silicon Dioxide / SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Red Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)

Chert (specifically White Chert or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Mahogany Obsidian

Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)

Basalt River Stone

Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)

Ocean Jasper

Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)

Amazonite (Green Feldspar)

Microcline (variety Amazonite), Chemical Formula: K(AlSi3O8)

Red Garnet

Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

Eudialyte

Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)

Moss Agate

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

Blue Quartzite

Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite)

Pink Granite

Phaneritic Felsic Igneous Rock

Sunstone

Oligoclase (a variety of Plagioclase Feldspar) - (Na,Ca)(Si,Al)4O8

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Black Tourmaline

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

Quartz (Smoky/Grey Variety)

Silicon Dioxide (SiO2)

Quartz (Variety: Citrine or Tumbled Chalcedony)

Silicon Dioxide (SiO2)

Quartzite (specifically an iron-stained or Carnelian-colored variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)