Porphyritic Rhyolite (Llanite or similar)
Porphyritic Rhyolite / Quartz-Feldspar Porphyry
igneous
Category
Man Made Material (Jewelry, Metal Alloy)
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Iron Meteorite
Iron Meteorite (Group IAB or IIIAB common)
meteorite
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Unakite
Epidotized Granite
metamorphic
Green Fluorite in Host Rock
Fluorite (Calcium Fluoride, CaF2)
mineral
Pink Quartzite
Quartzite (primarily SiO2 with trace Fe2O3)
metamorphic
Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Sunstone
Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)
mineral
Fossil Coral (Petoskey Stone or Favosites)
Favosites (specifically Hexagonaria percarinata if silica-replaced Michigan type)
sedimentary
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Mookaite (Mookaite Jasper)
Silicified Radiolarite (SiO2 with iron oxides)
sedimentary
Gemstone Sand (Mineral Assortment)
Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)
mineral
Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
sedimentary
Graphic Granite (Runic Granite)
Pegmatite (Graphic Granite variety)
igneous
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Cinnabar in Quartz
Silicon Dioxide (Quartz, SiO2) with Mercury Sulfide inclusions (Cinnabar, HgS)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
sedimentary
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Chert (Flint variety)
Chert (SiO2)
sedimentary
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Amethyst
SiO2 (Silicon Dioxide) - Purple variety of Quartz
mineral
Sunstone
Oligoclase (Plagioclase Feldspar Group) - (Ca, Na)(Al, Si)4O8
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Mahogany Obsidian
Obsidian with Hematite inclusions (SiO2 + Fe2O3)
igneous
Quartzite and Chert
Silicon Dioxide (SiO2)
metamorphic and sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (extrusive volcanic rock with mineral inclusions)
igneous
Zebra Jasper
Tumbled Opaque Chalcedony (SiO2)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Ocean Jasper
Silicon Dioxide (SiO2)
Mineral_variety_of_Chalcedony
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Diamond
C (Carbon)
mineral
Chert (Jasper-rich River Cobble)
Cryptocrystalline Quartz (SiO2)
sedimentary
Dalmatian Stone and Lapis Lazuli
Dalmatian Stone (peralkaline rock) with Lapis Lazuli (metamorphic rock)
igneous
Jasper
Silicon dioxide (SiO2)
sedimentary
Fossil Shark Tooth
Odontaspididae (likely Carcharias sp.)
fossil
Fossil Shark Tooth
Chondrichthyes dentition (Fossilized Tooth)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil