Dendritic Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe)
mineral
Category
Organic (Sedimentary Associated)
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Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Rhodochrosite
Rhodochrosite, Manganese Carbonate (MnCO3)
mineral
Galena
Lead Sulfide (PbS)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Celestite
Celestine (SrSO4)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Jasper (Chert / Chalcedony)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Sandstone
Sedimentary rock containing invertebrate fossils
fossil
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Organic Gemstone (often associated with Sedimentary sequences)
Pyrite
Iron Sulfide (FeS2)
mineral
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
igneous
Fossiliferous Shale
Carbonaceous Shale (with potential plant/aquatic fossils)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Fluorite Bracelet
Calcium Fluoride (CaF2)
mineral
Pyrite in Quartz
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Green Jasper
Quartz (Silicon Dioxide, SiO2) with iron silicate inclusions
sedimentary
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Agate (Carnelian type)
Silicon Dioxide (SiO2)
mineral
Zoisite with Ruby
Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)
metamorphic
Red Jasper and Green Aventurine
Silicon dioxide (SiO2)
mineral
Galena with Pyrite
Lead Sulfide (PbS) associated with Iron Sulfide (FeS2)
mineral
Menilite Opal (Goddess Stone)
Menilite Opalescent Silex (Amorphous Hydrated Silica)
sedimentary
Chert (Green Fossilized Algae or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Black Limestone
Bituminous Limestone (Calcium Carbonate - CaCO3)
sedimentary
Dalmatian jasper
Dalmatian stone; commonly a leucocratic alkali-feldspar-rich igneous rock with arfvedsonite or aegirine inclusions
igneous
Chert (Jasper/Chalcedony mix)
Microcrystalline Quartz (SiO2)
sedimentary
Sea Shell (Mollusk Shell)
Calcium Carbonate (Aragonite/Calcite)
fossil
Blue Celestine
Celestine (SrSO4)
mineral
Epidote with Quartz Vein
Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Satin Spar (Gypsum)
Gypsum (Satin Spar variety) - CaSO4·2H2O
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Native Gold (in earring form)
Gold (Au)
mineral
Galena
Lead(II) sulfide (PbS)
mineral
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary