Sedimentary (Processed Mineral Product)

Quartz (Beach Pebble)

Silicon Dioxide (SiO2)

Blue Crackle Quartz (Dyed Fire Agate/Quartz)

Silicon Dioxide (SiO2) with artificial dye treatment

Native Gold in Quartz

Native Gold (Au)

Druzy Quartz

Silicon Dioxide (SiO2)

Gold Ore (in Quartz/Sulfide matrix)

Native Gold (Au) in Quartz (SiO2) and Pyrite (FeS2)

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Zinc Ore (Sphalerite in Matrix)

Sphalerite (Zn,Fe)S within a carbonate or silicate host rock

Smoky Quartz with Feldspar

Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)

Aura Quartz (Titanium-coated Quartz)

Silicon Dioxide (SiO2) with metallic vapor coating

Sandstone

Arenite (SiO2 dominant)

Selenite / Gypsum

Gypsum (CaSO4·2H2O)

Banded Agate

Silicon Dioxide (SiO2) - Variety Agate

Tiger's Eye

Silicon Dioxide (SiO2) - Pseudomorph of Quartz after Crocidolite

Aventurine

Aventurine Quartz (SiO2)

Gold

Native Gold (Au)

Peach Selenite / Orange Gypsum

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Tiger's Eye (Golden and Blue)

Silicon Dioxide (SiO2) with fibrous inclusions of Crocidolite

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Yellow Quartz (Citrine or Quartzite Pebble)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz Geode Slice

Silicon Dioxide (SiO2)

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Mother of Pearl (Nacre)

Nacre (Aragonite/Conchiolin), CaCO3 + Organic Polymers

Galena

Lead(II) sulfide (PbS)

Granite

Granite (Phaneritic igneous rock)

Chalcedony

Chalcedony (SiO₂)

Anthracite Coal

Anthracite (Carbon based fossil fuel)

Phantom Quartz (Chlorite Inclusion)

Silicon Dioxide (SiO2) with Chlorite (Mg,Fe,Al)6(Si,Al)4O10(OH)8

Granite Cobble

Plutonic Igneous Rock (Granitic)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Sandstone (likely Arkosic or Lithic)

Clastic Sedimentary Rock (SiO2 with accessory minerals)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Ruby

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Dyed Agate Slice

Silicon Dioxide (SiO2) - variety of Chalcedony

Satin Spar (Gypsum)

Hydrous Calcium Sulfate (CaSO4·2H2O)

Petrified Wood

Silicified Wood (SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)

Tiger's Eye

SiO2 (Pseudomorph of Quartz after Crocidolite)

Red Jasper (Heliotrope family variant)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Quartzite

Quartzite (primarily SiO2)

Sugilite

Sugilite [KNa2(Fe,Mn,Al)2Li3Si12O30]