Man Made Metamorphic Style Composite

Veined Pebble (likely a Quartz-Veined Pebble)

Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Quartzite (River Cobble)

Quartzite (predominantly SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Citrine or Yellow Quartz

Silicon Dioxide (SiO2) with iron impurities

Rhodonite

Rhodonite (MnSiO3)

Marble

Recrystallized Calcite (CaCO3) Rock

Note: The image provided is a fabric sock, not a geological specimen.

Polyester-Cotton Blend with Elastane

Coral Rock (Coquina)

Biogenic Limestone (Calcium Carbonate - CaCO3)

Citrine

Citrine (Silicon Dioxide, SiO2)

Citrine Quartz Sphere

Silicon Dioxide (SiO2)

Quartz (likely Rose Quartz or Milky Quartz based on color)

Quartz (SiO2 - Silicon Dioxide)

Yellow Citrine Quartz

Silicon Dioxide (SiO₂)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Peacock Ore

Bornite (Cu5FeS4)

Marble

Metamorphosed Limestone (calcite formulation CaCO3)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Magnetite

Magnetite (Fe3O4)

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Amber (Simulated/Faturan Style)

Resin mix (Likely Phenolic/Celluloid if synthetic, Succinite if natural)

Marble

Recrystallized Calcite (CaCO3)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Marble

Recrystallized Calcite / Dolomite (CaCO3)

Clear Quartz

Silicon dioxide (SiO2)

Pink Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

Milky Quartz

Silicon Dioxide (SiO2)

Wood Paneling

Engineered Wood / Plywood Paneling

Corundum (Sapphire in Host Rock)

Corundum (Aluminum Oxide, Al2O3)

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

Clear Quartz

Crystalline Silicon Dioxide (SiO2)

Granite

Granite (felsic intrusive igneous rock)

Native Gold (in the form of jewelry)

Gold (Au)

Slate

Slate (Regional metamorphic rock composed primarily of quartz, illite, and chlorite)

Corundum (Ruby/Sapphire crystal)

Al2O3 (Aluminum Oxide)

Yellow Quartzite Pebble

Quartzite (primarily Silicon Dioxide - SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Schist

N/A (a rock type, not a mineral formula)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])