Fossilized Shark Tooth
Carcharhinus sp. (likely Bull or Requiem shark family)
sedimentary
Category
Mineral, Jewelry
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Septarian (Dragon Stone)
Septarian Nodule (Aragonite, Calcite, Limestone)
sedimentary
Fossilized Coprolite
Coprolite (fossilized feces)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Carnelian
SiO2 (Silicon Dioxide - Chalcedony variant)
mineral
Carnelian (Tumbled)
Silicon Dioxide (SiO2)
mineral
Pink Howlite (Dyed)
Dyed Howlite / Silicoborocalcite (Ca2B5SiO9(OH)5)
mineral
Carnelian
Chalcedony (SiO2)
mineral
Beryl (likely Emerald or Aquamarine in matrix)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Cherry Quartz
SiO2 (Silicon Dioxide with iron-rich inclusions/dye)
mineral
Tiger's Eye, Hematite, and Black Obsidian Bracelet
SiO2 (Tiger's Eye), Fe2O3 (Hematite), and 70-75% SiO2 (Obsidian)
mineral
Dyed Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Turquoise and Hematite
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Black Onyx
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Diamond (in a jewelry setting)
Carbon (C)
mineral
Diamond (in jewelry setting)
Diamond (Native Carbon, C)
mineral
Diamond (Set in jewelry)
Cubic Carbon (C)
mineral
Rutilated Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2 with Epidote/Tourmaline inclusions
mineral
Red Jasper
Silicon dioxide (SiO2) with hematite (Fe2O3) inclusions
mineral
Garnet (Pyrope-Almandine series)
Garnet Group, (Mg,Fe)3Al2Si3O12
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Aventurine
Aventurine Quartz (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Lapis Lazuli
Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Carnelian Agate
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Fire Agate (Crackle Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Amazonite
Potassium Feldspar (KAlSi3O8)
mineral
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Hematite impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate
Silicon Dioxide (SiO2)
mineral
Amazonite
Amazonstone (KAlSi3O8)
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Aventurine
Quartz (Variety Aventurine), SiO2
mineral
Aventurine
Quartz with fuchsite inclusions (SiO2)
mineral
Green Aventurine
Quartz with fuchsite inclusions (SiO2)
mineral
Tiger's Eye (Brown/Golden)
Silicon dioxide (Quartz pseudomorph after crocidolite), SiO2
mineral
Likely metallic sulfide mineral fragment
Possibly galena (PbS) or pyrite (FeS₂); identification is uncertain from the photograph
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Fossilized Shark Tooth (Otodus)
Otodus obliquus
fossil