Metamorphic Or Igneous With Mineral Inclusion

Obsidian

Volcanic glass (mainly SiO2 with inclusions)

Red Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Fe2O3 inclusions)

Basalt Pebble with Epidote/Olivine

Vitreous Basalt (SiO2 with Ca/Mg/Fe silicates)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)

River Pebble (Quartzite/Chert)

Quartzite with inclusions (SiO2)

Rhodonite

Rhodonite (MnSiO3)

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite River Rock with Dendrites

Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Arfvedsonite with Garnet

Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2

Quartzite Pebble (with Iron Inclusions)

Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)

Granite

Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Garnet Schist

Almandine-Muscovite Schist

Rose Quartz

Silicon Dioxide with traces of Titanium, Iron, or Manganese (SiO2)

Ferruginous Sandstone with Quartz Inclusions

Clastic Sedimentary Rock (Iron-rich Sandstone)

Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

White Quartz Pebble

Silicon Dioxide (SiO2)

Black Sand (Magnetite Sand)

Magnetite-rich Placers (Fe3O4)

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite (riebeckite)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Granite

Felsic Intrusive Igneous Rock (SiO2, Al2O3, K2O, Na2O)

Granite

Granite (Felsic Intrusive Igneous Rock)

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Granite

Granite (composed primarily of Quartz SiO2, Orthoclase KAlSi3O8, and Plagioclase NaAlSi3O8 to CaAl2Si2O8)

Pink Granite

Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz

Silicon Dioxide (SiO2)

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

Snowflake Obsidian (Flower Jasper variant)

Vitreous volcanic silicate with cristobalite inclusions

Sandstone (Red)

Arenite (primarily Quartz, SiO2, with Iron Oxide cement)

Bloodstone / Heliotrope

Silicon dioxide (SiO2) with inclusions

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Yellow Chalcedony (Carnelian/Yellow Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz