Chert (or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Mineral And Organic Gemstone
Browse mineral and organic gemstone specimens identified by the Rock Identifier community.
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Amber
Succinite (fossilized tree resin)
mineraloid
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Red Chert / Jasper)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Jasper (Silicon Dioxide) - SiO2
sedimentary
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint or Jasper)
Cryptocrystalline quartz (SiO2)
sedimentary
Chert (White Chert or Flint)
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Banded Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of hornblende or chlorite
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Amber (Copal)
Succinate (Fossilized Tree Resin)
mineraloid
Quartz Fragment
Silicon Dioxide (SiO2)
mineral
Dyed Pink Quartzite (Jadeite Simulant)
Silicon Dioxide (SiO2) with organic dye
metamorphic
Chert (Brown variety / Common Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Mother of Pearl (Nacre)
Aragonite (CaCO3) with Organic Matrix
mineral
Dinosaur Claw Fossil
Fossilized Theropod Claw (Vertebrate Palaeontological Specimen)
fossil
Limestone (or Sandstone)
Calcium Carbonate (CaCO3) / Silica (SiO2)
sedimentary
Sandstone (with Moss)
Quartz Arenite / Sandstone
sedimentary
Poppy Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Amber
Succinite (organic fossilized resin)
mineraloid
Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)
Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)
fossil
Quartz (Smoky/Rose Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Fossilized Bone Fragment
Vertebrate Fossil
fossil
Graphite
Graphite (Carbon, C)
mineral
Chert (Jasper)
Microcrystalline quartz (SiO2)
sedimentary
Amber / Copal
Succinite (fossilized resin)
mineraloid
Chert (specifically Flint or Common Chert)
Silicon dioxide (SiO2) - Microcrystalline quartz
sedimentary
Jasper (Petrified Wood variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz crystal fragment
Quartz (silicon dioxide, SiO₂)
mineral
Chert (Jasper/Chalcedony pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint or Agate nodule)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Blue-Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3 with Carotenoid pigments)
Mineraloid (Organic Gemstone)
Biotite-bearing granite or granitic gneiss
Quartz–feldspar–biotite aggregate; likely granite, possibly weathered gneiss
igneous
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (variations include Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary