Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Agate Geode

Chalcedony (cryptocrystalline SiO2)

Petrified Wood

Silicified wood (primarily Silicon Dioxide - SiO2)

Quartz (worked as a tool or artifact)

Silicon Dioxide (SiO2)

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Vesicular Basalt

Amygdaloidal Basalt (Mafic extrusive volcanic rock)

Green Calcite

Calcite (Calcium Carbonate, CaCO3)

Ferruginous Sandstone (Gerrit)

Arenite with Iron Oxide cementation

Granite or Granodiorite (Weathered)

Granite

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Ocean Jasper

Silicon Dioxide (SiO2) with various inclusions

Lepidolite

K(Li,Al)3(Si,Al)4O10(F,OH)2

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Garden Quartz (Phantom Quartz)

Silicon Dioxide (SiO2) with various inclusions (often Chlorite, Hematite, or Iron)

Lepidolite

K(Li,Al)3(Al,Si)4O10(F,OH)2 (Lithium-bearing phyllosilicate)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Druze (Crystalline Quartz)

Silicon Dioxide (SiO2)

Chert (with Limestone/Dolomite host)

Microcrystalline Quartz (SiO2)

Ironstone Concretion (Limonite/Goethite)

Goethite-rich Concretion (FeO(OH))

Shiva Lingam

Cryptocrystalline Quartz (Jasproid/Jasper)

Ferruginous Sandstone (Gozzan-like)

Ferruginous Sandstone (SiO2 with FeO(OH) inclusions)

Chert (Septarian Concretion/Nodule)

Microcrystalline silica (SiO2) with carbonate mineral veining

Ironstone (likely siderite or goethite-rich siltstone)

Ferruginous Siltstone

Ferruginous Breccia

Breccia with Iron-rich (Hematite/Goethite) Matrix

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Limonite (Ironstone Concretion)

Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)

Aquamarine

Beryl (Be3Al2Si6O18), specifically the blue-green variety

Quartz (Milky or Common variety)

Silicon Dioxide (SiO2)

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions

Porphyritic Basalt (with Pyrolusite or Iron-oxide staining)

Porphyritic Basalt (Mafic Extrusive)

Granite

Phaneritic Felsic Intrusive Igneous Rock

Black Obsidian

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

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)

Vesicular Basalt

Vesicular Basalt (Aphanitic Mafic Rock)

Granite Pebble (Salt and Pepper Granite)

Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Biotite/Amphibole)

Slate

Foliated Metamorphic Rock (primarily composed of quartz, illite, chlorite, and micas)

Pyrite

Iron Sulfide (FeS2)

Grey Chalcedony (Tumbled)

Chalcedony (SiO2)

Chalcedony (Agate/Carnelian precursor)

Chalcedony (Silicon Dioxide, SiO2)

Carnelian

Carnelian (Silica, SiO2)