Organic (Non Geological)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Natural Gold Nugget

Native Gold (Au)

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (Limonite/Hematite over Sandstone)

Quartz Geode

Silicon Dioxide (SiO2)

Sandstone (Pebble)

Arenite (composed primarily of SiO2)

Sandstone

Arenite (SiO2 primarily)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Rose Quartz

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

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)

Silicon Dioxide (SiO2) with metallic inclusions

Clear Quartz

Silicon Dioxide (SiO2)

Fossil Coral (Petoskey Stone / Rugose Coral)

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

Gold

Native Gold (Au)

Ferruginous Sandstone

Arenite with Iron-oxide cement

Obsidian

Obsidian (principally SiO2 silicon dioxide)

Quartz (Milky Quartz / Quartzite)

Silicon Dioxide (SiO2)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky/Granular)

Silicon Dioxide (SiO2)

Granite

Granite (a common term for a felsic intrusive igneous rock)

Quartz Geode (with Calcite influence)

Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)

Milky Quartz Pebble with Chert

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Gold Nugget

Native Gold (Au)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Chromium (Chrome)

Chromium (Cr)

Fossil Bivalve Shell

Class Bivalvia (e.g., Veneriidae family)

Vesicular Basalt with Xenocrysts

Mafic Igneous Plutonic/Extrusive Complex

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Milky Quartz

Silicon Dioxide (SiO2)

Obsidian

Obsidian (Volcanic Glass)

Quartz (specifically Clear and Rose Quartz)

Silicon Dioxide (SiO2)