Mineral (Man Modified)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz Cluster

Smoky Quartz (Silicon Dioxide - SiO2)

Calcite

Calcium Carbonate (CaCO3)

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Sapphire (Raw/Rough)

Corundum (Al2O3)

Sodalite

Sodalite Na8(Al6Si6O24)Cl2

Atlantic Calico Scallop (Biogenic Aragonite/Calcite)

Argopecten gibbus (Chemical: CaCO3)

Olivine

Olivine group (Mg, Fe)2SiO4

Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Hematite (Oolitic or Earthy variety)

Iron(III) oxide (Fe2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Agate

Silicon Dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide impurities), formula: SiO2

Pink Opal

Amorphous Hydrous Silica (SiO2·nH2O)

Emerald in Host Rock

Beryl (Be3Al2Si6O18) containing Chromium and/or Vanadium

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Native Copper

Native Copper (Cu)

Yellow Quartz Pebble

SiO2 (Silicon Dioxide)

Hematite

Iron(III) oxide (Fe2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Sandstone with Tafoni Weathering

Arenite (SiO2 based)

Serpentinite

Serpentinite (group of hydrous magnesium iron phyllosilicates)

Manganese Oxide Crust on Limestone

Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3

Quartzite River Rock

Quartzite (primarily SiO2)

Kimberlite with Diamond

Kimberlite (Porphyritic Peridotite)

Rose Quartz

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Druzy Agate (Star-cut Geode Slice)

Silicon Dioxide (SiO2) - Microcrystalline and Macrocrystalline Quartz

Rose Quartz

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

Chalcedony (River Stone)

Silicon Dioxide (SiO2)

Milky Quartz with Mineral Inclusions

Quartz (Silicon Dioxide, SiO2)

Chromium (Chrome)

Chromium (Cr)

Chalcedony (specifically Agate or Moonstone-like Quartz)

Silicon Dioxide (SiO2)

Dumortierite Quartz (Blue Quartz)

Al7BO3(SiO4)3O3 (Aluminum Boro-silicate included in Quartz)

Milky Quartz

Silicon Dioxide (SiO2)

Rose Quartz (or Quartzite)

Silicon Dioxide (SiO2)

Chalcedony (River Stone)

Microcrystalline Quartz (SiO2)

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Sandstone (specifically Red Sandstone)

Arenite (primarily Quartz, SiO2)

Sandstone (Quartzite Pebble)

Arenite (primarily SiO2)