Fossiliferous Shale
Laminated Mudrock with plant fossils
sedimentary
Category
Organic Gem Material (Botanical)
Browse organic gem material (botanical) specimens identified by the Rock Identifier community.
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Amber / Copal
Fossilized Tree Resin (Succinate)
Mineraloid
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone with Iron Oxide Concretion
Arenite with Hematite/Goethite Concretion
sedimentary
Amber
Fossilized Tree Resin
gemstone
Amber
Succinite (Fossilized Tree Resin, C10H16O)
mineral
Amber (Copal)
Succinate (Fossilized Resin)
mineraloid
Amber
Succinite (C10H16O)
mineral
Sandstone Concretion
Arenaceous concretion (primarily SiO2 with Fe2O3 staining)
sedimentary
Green Moss Agate / Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron and Manganese inclusions
sedimentary
Amber / Copal
Succinite (fossilized tree resin)
mineraloid
Shale
Shale (comprised mostly of clay minerals and quartz)
sedimentary
Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Pearl (likely Freshwater or Akoya Cultured)
Aragonite / Conchiolin composite (CaCO3)
Mineralloid (Organic gemstone)
Shale
Fissile Mudstone (Shale)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide / SiO2)
mineral
Moss Agate
Cryptocrystalline Quartz (SiO2 with manganese or iron oxide inclusions)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Precious Red Coral
Corallium rubrum / Corallium japonicum
mineral (organic gemstone)
Chert (Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (with Limestone matrix)
Microcrystalline Quartz (SiO2)
sedimentary
Garnet (Red Garnet)
Garnet Group. The red varieties seen in jewelry are typically Almandine (Fe3Al2(SiO4)3), Pyrope (Mg3Al2(SiO4)3), or a mix of the two (pyrope-almandine series).
Mineral (specifically, a variety of the mineral species Pyrope-Almandine Garnet)
Chert (Black Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Amber
Succinite (with a generalized formula of C10H16O)
mineral
Shale (or Mudstone)
Siltstone/Argillite (composed mainly of clay and silt-sized particles)
sedimentary
Pink Opal
Hydrated Silica (SiO2·nH2O)
mineral
Black Dolomite
Bituminous Dolomite (CaMg(CO3)2)
sedimentary
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Ironstone Concretion (Limonite/Goethite)
Iron oxide concretion (contains FeO(OH)·nH2O)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Amber
Succinicum (Formula: C10H16O)
Mineraloid
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2 with chlorite inclusions)
mineral
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Oxide inclusions
mineral
Limestone (Tufa/Travertine)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Concretion
Septarian Concretion (Fragmentary)
sedimentary
Ocean Jasper or Orbicular Jasper
SiO2
mineral
Chert / River Cobble
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Brown Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (often called Jasper or Flint)
Microcrystalline Silica (SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Glauconitic Sandstone (Greensand)
Glauconitic Sandstone (Iron-potassium phyllosilicate mineral: (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary