Probable amber fragment
Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)
gemstone
Category
Mineral, Organic Gemstone
Browse mineral, organic gemstone specimens identified by the Rock Identifier community.
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Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2 with chlorite inclusions)
mineral
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions
mineral
Chalcedony / Agate with Botryoidal Quartz
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert (including Flint and Jasper variants)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Smoky variety)
Microcrystalline Quartz (SiO2)
sedimentary
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
mineral
Fossilized Shell
Invertebrate fossil (Bivalvia or Brachiopoda)
fossil
Amber
Succinite (Fossilized Tree Resin, C10H16O)
mineral
Moss Agate
Chalcedony (Silicon Dioxide / SiO2)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Green Moss Agate / Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron and Manganese inclusions
sedimentary
Amber (Cherry or Red variety)
Succinite (with various trace amounts of organic compounds)
Organic Gemstone (not a rock)
Mookaite Jasper
Silicified Radiolarite (SiO2 with iron impurities)
sedimentary
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Chalcedony/Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Amber
Succinite (with a generalized formula of C10H16O)
mineral
Chert (specifically Flint or Jasper variant)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper (specifically Yellow Jasper and Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Picasso Jasper (or Picasso Marble)
Metamorphosed Limestone (Calcium Carbonate, CaCO3, with impurities)
metamorphic
Chert (Jasper/Chalcedony)
Microcrystalline Silica (SiO2)
sedimentary
Moss Agate
Chalcedony (SiO2) with dendritic inclusions of Manganese or Iron oxide
mineral
Fossilized Shell Fragment / Mother of Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite biomineral
fossil
Chert (often called Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Green Moss Agate
Agate (Silicon Dioxide, SiO2) with inclusions
mineral
Chert (with Limestone matrix)
Chert (Silica: SiO2)
sedimentary
Fossil Shark Tooth
Lamniformes (order) - likely Cretalamna or Carcharias species
fossil
Quartz with Tourmaline inclusions
Silicon Dioxide (SiO2) with Tourmaline needles
mineral
Petrified Wood
Silicified Wood (Permineralized wood)
fossil
Chert (Iron-stained)
Chert (SiO2)
sedimentary
Chert (Flint variety)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Silicon dioxide (SiO2)
sedimentary
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Limestone Concretion (Botryoidal/Calcareous Nodules)
Calcium Carbonate Concretion (CaCO3)
sedimentary
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Yellow Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with iron oxide (Limonite/Goethite) inclusions
sedimentary
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary