Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)
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Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Ferruginous Sandstone
Sandstone with Iron Oxide (Limonite/Goethite)
sedimentary
Ironstone Nodules (Iron Concretion)
Siderite or Hematite Concretion
sedimentary
Sandstone (Siltstone or Fine-grained)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Exogyra or Gryphaea species)
fossil
Demantoid Garnet on Matrix
Demantoid (variety of Andradite Garnet) - Ca3(Fe3+)2(SiO4)3
mineral
Smoky Quartz
Quartz (Silicon Dioxide) - SiO2
mineral
Greenstone
Chlorite schist or metabasalt depending on specific composition
Metamorphic
Agate
Cryptocrystalline quartz (SiO2)
Mineral
Greenstone / Greenschist
Greenschist (contains chlorite, epidote, actinolite)
metamorphic
Quartz-Veined Sandstone
Quartz-veined Arenite
sedimentary
Gneiss
Gneiss
metamorphic
Slate with Quartz
Low-grade Metamorphic Slate with SiO2 inclusions
metamorphic
Greenstone / Metabasalt
Chlorite schist or Epidiorite
metamorphic
Schist
Mica Schist
metamorphic
Gneiss
Gneiss
metamorphic
Almandine Garnet
Fe3Al2(SiO4)3
mineral
Sodalite
Na8Al6Si6O24(Cl,OH)2
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4
metamorphic
Sandstone
Arenite (SiO2 principal)
sedimentary
Gneiss
Gneiss
metamorphic
Pegmatite with Quartz and Feldspar
Intrusive Igneous Rock
igneous
Peach Moonstone (Feldspar variety)
Orthoclase Feldspar (KAlSi3O8) with inclusions
mineral
Black Shale
Argillaceous Chert/Shale
sedimentary
Schist
Schist
Metamorphic
Greenstone
Chlorite schist or Epidosite
metamorphic
Serpentine
Serpentinite (rock), Serpentine group minerals (e.g., Antigorite, Lizardite, Chrysotile)
Metamorphic rock
Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8) with inclusions of Albite
mineral
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone with Iron Staining
Arenite (SiO2 with Fe-oxide impurities)
sedimentary
Iron Concretion
Ferruginous concretion (Fe2O3·nH2O / FeO(OH))
sedimentary
Gneiss
High-grade foliated metamorphic rock
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Raw Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Quartz Boulder
Silicon Dioxide (SiO2)
mineral
Magnetite / Ironstone Pebble
Magnetite (Fe3O4)
mineral
Banded Gneiss
Gneiss (pronounced "nice")
Metamorphic Rock