Man Made Material (Simulated Mineral)

Jasper with Hematite Inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Ruby in Kyanite

Al2O3 (Corundum) in Al2SiO5 (Kyanite-Fuchsite-Quartz)

Eudialyte in Syenite (Dragon Blood Stone)

Na15Ca6(Fe,Mn)3Zr3(Si25O73)(O,OH,H2O)3(Cl,OH)2

Petrified Wood

Silicified Wood (SiO2)

Jasper (Picture Jasper variety)

Silicon Dioxide (SiO2) with impurities

Sandstone (likely Ferruginous)

Sandstone (SiO2 with iron oxides)

Sandstone

Arenite (SiO2 predominantly)

Quartz Geode

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Rose Quartz

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

Pyrite

Iron Disulfide (FeS2)

Sandstone (Quartzose)

Arenite (SiO2 based)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Pyrite (on host rock)

Iron Sulfide (FeS2)

Granite

Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O

Red Sandstone (Old Red Sandstone)

Ferruginous Sandstone (SiO2 + Fe2O3)

Slate

Slate (foliated metamorphic rock)

Obsidian

Volcanic Glass (SiO2)

Petrified Wood

Silicified Wood / Chalcedony (SiO2)

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock - Arenite

Amethyst Geode (Thunderegg)

Silicon Dioxide (SiO2) - Quartz Variety: Amethyst

Gold Nugget

Native Gold (Au)

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxides

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Libyan Desert Glass

Impactite (vitreous silica), SiO2

Diamond (in Matrix)

Carbon (C)

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

Sandstone

Arenite (SiO2 primarily)

Shale

Laminated Mudstone

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Chert / Flint

Chert (varietal name for microcrystalline quartz). Chemical formula: SiO₂

Dendritic Agate (Tree Agate)

Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions

Tree Agate (or Moss Agate)

Dendritic Agate (Silicon Dioxide - SiO2)

Pyrite

Iron Sulfide (FeS2)

Chert (specifically Yellow/Honey Jasper variety)

Cryptocrystalline Quartz (SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Serpentine (Serpentinite)

Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)