Orbicular Jasper (Ocean Jasper variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
Sedimentary Or Mineral
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Pyrite
Iron Sulfide (FeS2)
mineral
Halite (Rock Salt)
Sodium Chloride (NaCl)
mineral
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily Quartz and Feldspar)
sedimentary
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Fossilized Shark Tooth (Fragment) in Matrix
Elasmobranchii (subclass)
fossil
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
mineral
Sandstone (Lithic Wacke)
Clastic sedimentary rock (primarily SiO2 with rock fragments)
sedimentary
Sandstone (Calcareous or Quartz-rich)
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Milky Quartz Nodule / Geode precursor
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Magnetite (Loadstone candidate)
Iron(II,III) oxide (Fe3O4)
mineral
Dyed Howlite (often sold as Turquenite)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Quartz Geode (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Barite
Barium Sulfate (BaSO4)
mineral
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Drupa or Druzy Quartz on Geode Fragment
Crystalline Silicon Dioxide (SiO2)
mineral
Iron Concretion
Ferruginous concretion (Fe2O3·nH2O / FeO(OH))
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Agate
Cryptocrystalline Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony (Geode fragment)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Optical Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Yellow Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Specular Hematite
Iron(III) oxide (Fe2O3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral