Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Category
Mineral, Jewelry
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Diamond (in Jewelry)
Diamond (Carbon, C)
mineral
Mixed Gemstones and Minerals
Mixed Silicates and Oxides (Quartz/Amethyst, Aventurine, Sodalite, Chert, Jasper)
mineral
Shark Tooth Fossil
Chondrichthyes fossil
fossil
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Howlite and Purpurite druzy
Calcium Borosilicate Hydroxide (Howlite) and Manganese Phosphate (Purpurite)
mineral
Diamond (in jewelry setting)
Diamond (Carbon, C)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Snowflake Obsidian
Obsidian with Cristobalite inclusions (SiO2)
igneous
Diamond
Diamond (Pure Carbon, C)
mineral
Geode
Quartz / Chalcedony nodule with mineralized cavity
sedimentary
Diamond
C (Carbon)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Eudialyte
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Purpurite
Manganese Iron Phosphate, Mn3+(PO4)
mineral
Chrysocolla
Cu2-xAlx(H2O)n(H2Si2O5)5 · nH2O (Hydrated copper aluminum silicate)
mineral
Druzy Quartz on Ironstone
Silicon Dioxide (SiO2) on Limonitic Ironstone
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Agate
Chalcedony SiO2
mineral
Magnesite or Howlite (dyed or naturally patterned)
Magnesium carbonate (MgCO3) or Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Blue Topaz
Al2SiO4(F,OH)2
gemstone
Turquoise and Hematite
Turquoise: CuAl6(PO4)4(OH)8·4H2O; Hematite: Fe2O3
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminum)
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Carnelian
SiO2 (Silicon dioxide)
mineral
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8) with inclusions
mineral
Cream Quartz Bead
Silicon Dioxide (SiO2)
mineral
Sphalerite with Siderite and Pyrite
Zinc Sulfide (ZnS) with Iron Carbonate (FeCO3) and Iron Disulfide (FeS2)
mineral
Fossil Shark Tooth
Odontaspididae (Sand Tiger Shark family)
fossil
Pyrite
Iron Disulfide (FeS2)
mineral
Milky Quartz with Algae/Chlorite
Silicon Dioxide (SiO2)
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
sedimentary
Tiger's Eye
Silicon dioxide with crocidolite inclusions (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral