Polished green moss agate cabochon
Moss agate: microcrystalline quartz (SiO₂) with included chlorite/actinolite or iron-manganese minerals
mineral
Category
Organic Gemstone (Not A Mineral)
Browse organic gemstone (not a mineral) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Not A Mineral) in the encyclopedia
View all →
Amber
Succinite (fossilized tree resin)
mineral
Amber
Succinate (Succinite for Baltic varieties)
mineraloid
Amber
Succinite (Resin)
mineral
Amber
Succinite (approximate formula C10H16O)
mineral
Amber
Succinite (C10H16O)
mineral
Shark Tooth Fossil
Chondrichthyes (shark) tooth
fossil
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Quartz-veined Limestone
Sedimentary limestone with quartz/calcite veinlets
sedimentary
Pyrite
Pyrite (FeS2)
Mineral
Fossil Shark Tooth
Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth
sedimentary
Amber
Succinite (fossilized tree resin)
fossil
Chert (Flint)
Chert (SiO2)
sedimentary
Chert with Calcite Veins
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) intrusions
sedimentary
Sand Tiger Shark Tooth
Carcharias taurus
fossil
Unidentified Dark Mineral or Rock
Indeterminate (Likely Silicon Dioxide or Carbon-based)
mineral
Agate (Moss or Dendritic Agate)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Amber / Copal
Organic resin, C10H16O
mineral
Yellow Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with iron oxide (Limonite/Goethite) inclusions
sedimentary
Sandstone
Arenite
sedimentary
Limestone Concretion (Botryoidal/Calcareous Nodules)
Calcium Carbonate Concretion (CaCO3)
sedimentary
Dendritic Agate
Silicon Dioxide with Manganese/Iron oxide inclusions (SiO2)
mineral
Dendritic jasper/chalcedony
Silica-rich microcrystalline quartz (SiO₂) with manganese-oxide dendrites
mineral
Amber
Succinate (Succinite for Baltic varieties)
Organic Mineraloid
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral
Amber
Succinite (approximate formula C10H16O)
mineraloid
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossil Shark Tooth
Lamniformes (order) - likely Cretalamna or Carcharias species
fossil
Fossilized Shell Fragment / Mother of Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite biomineral
fossil
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
fossil
Chert (often called Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon dioxide (SiO2)
sedimentary
Chert (often called Flint or Jasper based on color)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Shale
Laminated Fissile Pelite
sedimentary
Graphite
Graphite (Carbon, C)
mineral
Graphite
Carbon (C)
mineral
Sandstone with Quartz Crystal Infill
Quartz-cemented quartz arenite
sedimentary