Man Made Object (Ring)

Milky Quartz

Silicon Dioxide (SiO2)

Obsidian

Amorphous volcanic glass (SiO2)

Jasper

Silicon dioxide (SiO2) with iron impurities

Red Jasper

Jasper (SiO2 with Fe2O3 inclusions)

Jasper (Iron-rich)

Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities

Quartz Geode

Silicon Dioxide (SiO2) in a Secondary Sedimentary/Volcanic cavity

Pegmatite with Smoky Quartz and Feldspar

Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8)

Turquoise in Matrix

Hydrous phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Ferruginous Sandstone

Arenite with Iron-oxide cement (composed of Quartz and Limonite/Hematite)

Rough Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Red Sandstone

Arenite (Fe2O3 rich)

Specular Hematite with Quartz

Ferric oxide (Fe2O3) and Silicon dioxide (SiO2)

Serpentinite (often containing Jadeite/Nephrite)

Antigorite-rich Serpentine Rock, (Mg, Fe)3Si2O5(OH)4

Sandstone (Ferruginous)

Arenite (SiO2 with iron oxide impurities)

Sandstone (Red/Brown Variety)

Arenite (SiO2 with iron oxide impurities)

Scoria (Lava Rock)

Scoria

Rose Quartz

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

Green Fluorite (Fluorite Sphere)

Calcium Fluoride (CaF2)

Chalcedony (specifically Agate or Moonstone-like Quartz)

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

Scoria

Vesicular Basaltic Andesite/Scoria

Green Fluorite

Fluorite (Calcium Fluoride, CaF2)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Agate (River Pea)

Microcrystalline Chalcedony (SiO2)

Granitic Pegmatite

Granite Pegmatite (typically containing Quartz SiO2, Feldspar KAlSi3O8, and Muscovite)

Fluorite

Calcium Fluoride (CaF2)

Ironstone Nodules / Siderite Concretion

Siderite (FeCO3) / Ferruginous Septarian Concretion

Sodalite Syenite

Sodalite-bearing Syenite (Na8(Al6Si6O24)Cl2)

Diamond

Native Carbon (C)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)

Quartzite

Quartzite (primarily SiO2)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Jasper

Silicon dioxide (SiO2)

Fluorite (often called Rainbow Fluorite or Purple-Green Fluorite)

Calcium Fluoride (CaF2)

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Gold Nugget

Native Gold (Au)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)