Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Category
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Chert (Common Opal or Agate)
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified wood (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Mammoth or Mastodon Tooth Fossil
Mammuthus / Mammut tooth
Jasper
Microcrystalline Quartz (SiO2)
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
Jasper
Microcrystalline Quartz (SiO2)
Jasper
Microcrystalline quartz (SiO2)
Fossilized Bone
Permineralized Vertebrate Bone
Shark Tooth Fossil
Vertebrate fossilized tooth (Chondrichthyes)
Shark Tooth Fossil
Vertebrate fossilized tooth
Chert (specifically Flint or Jasper variant)
Microcrystalline quartz (SiO2)
Pyrite
Iron Sulfide (FeS2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
Desert Rose / Ironstone Concretion
Hematite-cemented quartz concretion
Polished plume agate
Chalcedony (microcrystalline SiO₂) with iron-oxide inclusions
Baroque cultured pearl necklace
Pearl: nacre composed mainly of aragonite (CaCO₃) and conchiolin
Petrified Wood
Silicified Wood (primarily SiO2)
Dinosaur Bone Fossil
Permineralized Dinosaur Bone
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Chalcedony (Agatized Coral / Rough Chalcedony Node)
Silicon Dioxide (SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)
Petrified Wood
Silicified Wood (SiO2)
Shark Tooth Fossil
Selachii fossil
Chert (Chalcedony/Agate Pebble)
Cryptocrystalline Silica (SiO2)
Tumbled Jasper and Tiger's Eye
Silicon Dioxide (SiO2) with iron oxide inclusions
Shark Tooth Fossil
Carcharocles megalodon or similar fossilized shark tooth
Sandstone
Arenite
Chert (Nodule)
Cryptocrystalline Quartz (SiO2)
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
Yellow Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Jasper
Microcrystalline Quartz (SiO2)
Mammoth or Mastodon Tooth Fragment
Mammuthus / Mammut molar fragment
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz