Cat's Eye Chrysoberyl
Chrysoberyl (BeAl2O4)
mineral
Category
Mineral, Jewelry
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Lapis Lazuli
Lapis lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Tumbled Amethyst and Smoky Quartz
Silicon Dioxide (SiO2) with impurities
mineral
Garnet
Almandine/Pyrope Garnet (X3Y2(SiO4)3)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Lapis Lazuli
(Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2 (Complex silicate rock)
metamorphic
Yellow Aventurine
Quartz with inclusion minerals (SiO2)
mineral
Amethyst (as seen in jewelry)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst (in jewelry)
Silicon Dioxide (SiO2) with iron impurities
mineral
Fossilized Stingray Mouth Plate
Myliobatidae gen. et sp. indet. (e.g., Myliobatis, Aetobatus)
fossil
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Diamond (in jewelry)
Element Carbon (C)
mineral
Diamond (in jewelry)
Carbon (C)
mineral
Diamond (in jewelry)
Cubic Carbon (C)
mineral
Diamond (in jewelry)
Diamond (Carbon, C)
mineral
Vesuvianite (Idocrase)
Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10
mineral
Snowflake Obsidian
Obsidian with Cristobalite inclusions (SiO2)
igneous
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)
mineral
Fluorite (Rainbow, Purple-Blue Tumbled)
Calcium Fluoride (CaF2)
Mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper or Agate
Silicon dioxide (SiO2)
Mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 + Fe)
mineral
Chrysoprase
Chalcedony with nickel impurities (SiO2)
gemstone
Petrified Wood
Silicified wood (SiO2)
fossil
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chevron Amethyst
Silicon Dioxide (Quartz variety), SiO2
mineral
Bloodstone
Chalcedony (Variety Heliotrope), SiO2
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2), Quartz variety
mineral
Quartz (Jasper / Chert)
Silicon Dioxide (SiO2)
sedimentary
Agate Geode
Silicon Dioxide (Chalcedony/Quartz), SiO2
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony Geode
Silicon Dioxide (SiO2)
mineral
Agate (or Chalcedony pebble)
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate nodule fragment)
Silicon Dioxide (SiO2)
mineral
Gold in Quartz Matrix
Native Gold (Au) with Quartz (SiO2)
mineral
Quartz Crystal Matrix
Silicon Dioxide (SiO2)
mineral
Peridot
Olivine ((Mg,Fe)2SiO4)
gemstone
Clear Quartz Crystal
Silicon Dioxide (SiO2), Quartz
mineral