Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
mineral
Category
Synthetic Polymer (Synthetic Material)
Browse synthetic polymer (synthetic material) specimens identified by the Rock Identifier community.
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Jasper
Silicon dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Mammoth Tooth
Mammuthus tooth
fossil
Fossilized Horse Tooth
Equus sp. (Tooth)
fossil
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, $SiO_2$)
sedimentary
Fossil Shark Tooth
Selachii fossil
fossil
Poppy Jasper
Microcrystalline Quartz (SiO2) with hematite and other inclusions
sedimentary
Fossilized Oyster Shell
Ostrea / Exogyra (Phylum Mollusca)
fossil
Sandstone
Arenite (SiO2 composed primarily of quartz)
sedimentary
Chert / Flint
Silicon dioxide (SiO2)
sedimentary
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Chert (Yellow Jasper variant)
Silicon Dioxide (SiO2)
sedimentary
Chert
Silicon dioxide (SiO2)
Sedimentary
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities
mineraloid
Chert (Arrowhead)
Chert (SiO2)
sedimentary
Yellow Ochre / Limonite
Limonite (inter-mixed iron oxides and hydroxides, primarily FeO(OH)·nH2O)
mineral
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Chert (Flint Nodules)
Microcrystalline quartz (SiO2)
sedimentary
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
mineral
Fossilized Coral
Rugose coral / Tabulate coral fossil in limestone matrix
fossil
Carved Gemstone Mushroom
Quartz / Feldspar composite (Carved lapidary art)
gemstone
Crushed Stone (Gravel/Aggregates)
Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)
sedimentary and igneous (mixed)
Vuggy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Likely petrified wood or silicified fossil fragment
Silicified wood; predominantly microcrystalline quartz (SiO₂)
fossil
Tumbled honey-colored chalcedony or quartzite
Microcrystalline quartz, SiO₂; exact identification requires testing
mineral
Yellow chalcedony (likely citrine or iron-stained quartz)
Microcrystalline quartz, SiO₂; yellow coloration likely from iron oxides or included quartz varieties
mineral
Quartzite
Quartzite (principally SiO2)
metamorphic
Yellow Quartzite Pebble
Quartzite (SiO2)
metamorphic
Plume Agate or Moss Agate
Agate (SiO2)
mineral
Likely tumbled jasper or iron-rich chert
Microcrystalline quartz (SiO₂), potentially hematite/goethite-bearing
mineral
Dalmatian Stone and Lapis Lazuli
Dalmatian Stone (peralkaline rock) with Lapis Lazuli (metamorphic rock)
igneous
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Kyanite
Al2SiO5
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral