Metamorphic Rock (Composed Of Multiple Minerals)

Ruby in Fuchsite (often confused with Ruby in Zoisite)

Corundum (Al2O3) in Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2)

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Limonite Concretion (Ironstone)

Limonite / Goethite (FeO(OH)·nH2O)

Amethyst

Quartz variety; chemical formula: SiO₂ (silicon dioxide) with Fe³⁺ impurities

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Basalt with Limonite stains

Extrusive mafic igneous rock; Limonite (FeO(OH)·nH2O)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (SiO2)

Schist with Schorl (Black Tourmaline)

NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)

Quartzite

Quartzite (primarily SiO2)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Jasper with Hematite inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Tiger's Eye (likely Hawk's Eye variant)

Pseudomorph of Quartz after Crocidolite (SiO2)

Diorite (Salt and Pepper Rock)

Diorite

Basalt with Secondary Mineralization (Likely Zeolites or Calcite)

Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)

Blue Calcite

Calcium Carbonate (CaCO3)

Eclogite

Eclogite (Omphacite-Garnet rock)

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Chert (Chert Pebble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Unakite

Unakite (altered granitic rock)

Green Aventurine

Aventurine Quartz (SiO2 with fuchsite inclusions)

Basalt with Iron Oxidation

Mafic Igneous Rock (Basalt)

Sandstone (Ferruginous)

Arenite (with Iron Oxides)

Limonitic Sandstone (Stained Sandstone)

Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining

Quartz Crystal (specifically Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2-dominant rock)

Jadeite

Jadeite (NaAlSi2O6)

Mica Schist

Crystalline Schist (often primarily Muscovite or Biotite sheet silicates)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Unakite

Epidotized Granite

Quartzite

Quartzite (Primary mineral: SiO2)

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Halite

Halite (Sodium Chloride, NaCl)

Cockle Shell (Fossil or Recent)

Class Bivalvia, Family Cardiidae (e.g., Cerastoderma edule for common cockle)

Rough Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

River Rocks (Basalt and Sedimentary Stones)

Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock

Porphyritic Basalt (Amygdaloidal)

Porphyritic Mafic Volcanic Rock (Amygdaloidal Basalt)

Tiffany Stone

Fluoritized Opal Beryllium Tuff (composed of Fluorite; CaF2, Opalized SiO2, Bertrandite, Chalcedony, and Quartz)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)