Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Category
Mineral, Jewelry
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Chrysocolla
Cu2-xAlx(H2O)n(H2Si2O5)5 · nH2O (Hydrated copper aluminum silicate)
mineral
Purpurite
Manganese Iron Phosphate, Mn3+(PO4)
mineral
Druzy Quartz on Ironstone
Silicon Dioxide (SiO2) on Limonitic Ironstone
mineral
Yellow Jasper
Silicon Dioxide (Microcrystalline Quartz), SiO2
sedimentary
Crackle Glass (Simulated Gemstone)
Amorphous Solid (SiO2)
man-made glass
Blue Topaz
Al2SiO4(F,OH)2
gemstone
Carnelian
SiO2 (Silicon dioxide)
mineral
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Jasper
SiO2 (Cryptocrystalline quartz)
mineral
Milky Quartz with Algae/Chlorite
Silicon Dioxide (SiO2)
mineral
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Epidote-bearing Rock
Epidote / Silicate mineral aggregate
metamorphic
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
mineral
Tangerine Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite coatings
mineral
Amethyst and Smoky Quartz (Tumbled)
Silicon Dioxide (SiO2) with trace impurities iron (Amethyst) and aluminum/radiation (Smoky Quartz)
mineral
Chalcedony / Agate Nodule
Silicon Dioxide (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Amethyst Cluster
Silicon Dioxide (SiO2) with iron impurities
mineral
Bumblebee Jasper
Anhydrous Calcium Carbonate with Sulfur and Arsenic (Orpiment/Realgar)
sedimentary
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Smoky Quartz in Matrix
Silicon Dioxide (SiO2)
mineral
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Jasper
Silicon dioxide (Quartz variety), SiO2
sedimentary
Emerald (or possibly Green Glass / Slag)
Beryl (Be3Al2(SiO3)6)
gemstone
Jasper and Agate Mix
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Amethyst
Silicon Dioxide (Quartz variety)
gemstone
Agate Nodule / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Chevron Amethyst
Silicon Dioxide with Iron Impurities (SiO2)
mineral
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
mineral
Amethyst
Quartz (SiO2)
mineral
Amethyst
Quartz (SiO2)
gemstone
Blue Aventurine
Quartz (SiO2) with inclusions
mineral
Peridot
Olivine ((Mg,Fe)2SiO4)
gemstone
Chalcedony
Silicon Dioxide (SiO2)
mineral
Fire Opal in Host Rock
Amorphous Hydrous Silica (SiO2·nH2O)
mineral
Sunstone
Oligoclase (Plagioclase Feldspar), (Na,Ca)(Si,Al)4O8
mineral
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral