Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)

Chalcedony

Cryptocrystalline Quartz (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Jade (Nephrite or Jadeite)

Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 (amphibole mineral); Jadeite: NaAlSi2O6 (pyroxene mineral)

Chert (Flint)

Silicon dioxide (SiO2)

Limonite (Iron Ore)

Limonite (̑FeO(OH)·nH₂O)

Chert (variations include Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (specifically Jasper or Flint variant)

Cryptocrystalline Quartz (SiO2)

Limestone with Quartz or Calcite Veining

Calcium Carbonate (CaCO3) matrix with SiO2 or CaCO3 inclusions

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with impurities of Hematite or Goethite

Granitic Pegmatite

Pegmatitic Granite

Granatic Pegmatite

Pegmatitic Granite

Pegmatitic Granite

Granite (Alkali-feldspar granite) with Quartz and Orthoclase

Granitic Pegmatite

Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)

Fossilized Crab Carapace (Concretion)

Decapoda (fossil), typically preserved in calcite or siderite concretion

Sodalite

Na8(Al6Si6O24)Cl2

Granite (Core Sample)

Phaneritic Felsic Igneous Rock (Granite)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Geode (Smoky Quartz)

Silicon Dioxide (SiO2)

Limonite (Iron Ore)

Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O

Chert (often called Flint when dark or found in chalk)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Dragon Vein Agate

Chalcedony (Quartz) - SiO2

Tiger's Iron

Pseudomorphic Quartz Aggregate (contains SiO2 with Fe2O3 and FeOOH)

Chert (Jasper variation)

Silicon dioxide (SiO2)

Glacial Cobble (likely Granitic or Gneissic)

Granite/Gneiss Glacial Erratic

Green Moss Agate / Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron and Manganese inclusions

Sandstone

Arenicola (comprising mostly Quartz, SiO2)

Gneiss

Gneiss (High-grade metamorphic rock)

Yellow Jade (Yellow Chalcedony/Quartz)

Silicon Dioxide (SiO2)

Dendritic Agate

Silicon Dioxide (SiO2) with manganese/iron inclusions

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Chalcedony (Botryoidal or Tumbled)

Chalcedony (SiO₂)

Kyanite in Quartz

Kyanite (Al2SiO5) with Quartz (SiO2) matrix

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Muscovite Schist with Quartz

KAl2(AlSi3O10)(OH)2 in Schistose matrix

Black Obsidian

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

Diorite

Diorite (Intermediate intrusive igneous rock)

Vesicular Basalt with Epidote

Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))