Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
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Green Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood and Mixed Rocks
Silicified Wood (SiO2)
fossil
Picture Jasper
SiO2
mineral
Chert (specifically Flint or Gray Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified wood (SiO2 - Silicon Dioxide)
sedimentary
Rough amber-like brown mineral specimen
Uncertain from photograph; possibly iron-stained quartz, common opal, or resinous amber
mineral
Fine-grained dark igneous rock, likely basalt
Basalt; predominantly plagioclase feldspar and pyroxene, commonly with minor olivine and iron-titanium oxides
igneous
Chert (Nodular Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Shark Tooth
Otodus sp. (possibly Otodus obliquus)
fossil
Fossilized Shark Tooth
Eocene Lamniformes (Mackerel Shark clade)
fossil
Vesicular volcanic rock, possibly weathered basalt or scoria
Basaltic scoria/vesicular basalt; predominantly plagioclase, pyroxene, and iron-titanium oxides
igneous
Mosasaur Tooth Fossil
Mosasauridae (likely Prognathodon or Mosasaurus)
fossil
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Chert (Common Opal or Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
igneous
Quartz (Smoky/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified wood (SiO2)
fossil
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Unakitized Granite
Granite / Altered Monzonite with Epidote
igneous
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
mineral
Chalcedony (Agate/Carnelian variety)
Cryptocrystalline Quartz (SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Dyed Crackle Quartz
Silicon Dioxide (SiO2) with artificial dye
mineral
Diamond (or Cubic Zirconia simulant)
C (Carbon) or ZrO2 (Zirconium Dioxide)
gemstone
Tektite (Indochinite)
Tektite (High-silica natural glass)
mineraloid / impact glass
Copper ore with native copper and quartz/calcite
Malachite–chrysocolla–cuprite-bearing copper ore, likely with quartz or calcite gangue
mineral
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Amber
Succinite (fossilized resin)
mineral
Diamond
C (Carbon)
gemstone
Drupa or Druzy Quartz on Geode Fragment
Crystalline Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Shark Tooth Fossil
Carcharhiniformes or Lamniformes (order level fossil)
fossil
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (class) fossilized tooth
fossil
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil