Jasper
Microcrystalline quartz (SiO2)
sedimentary
Category
Man Made Object (Simulant)
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Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Aventurine
Quartz (Variety Aventurine), SiO2
mineral
Amber
Fossilized tree resin
gemstone
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Chrysoprase
Silicon Dioxide (Chalcedony variety), SiO2
gemstone
Quartz Vein Rock
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Black Agate
Chalcedony (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (SiO2), Microcrystalline Quartz
sedimentary
Chalcedony
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Amethyst (Resin Carving/Orgonite)
Silicon Dioxide (SiO2) with iron impurities
mineral
Agate
SiO2
Mineral/Gemstone
Blue-green chrysocolla rough specimen
Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite
mineral
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
mineral
Quartzite
Metamorphic Quartzite
metamorphic
Green Quartzite
Metamorphic Quartz Sandstone (SiO2)
metamorphic
Red Quartzite
Quartzite (Metamorphosed Quartz Arenite)
metamorphic
Diamond
Carbon (C)
gemstone
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Greenstone
Metabasalt / Metavolcanic rock
metamorphic
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert
Chert (SiO2)
sedimentary
Sandstone
Arenite (SiO2, often with CaCO3 or Fe2O3 cement)
sedimentary
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Natural Pearl
Calcium carbonate (primarily Aragonite and Conchiolin), CaCO3
mineral
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Slate
Metamorphic Pelitic Rock
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Flint
SiO2 (Cryptocrystalline Quartz)
sedimentary