Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Category
Browse organic gemstone (often associated with sedimentary sequences) specimens identified by the Rock Identifier community.
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Red Chert
Microcrystalline Quartz (SiO2)
Chert (Red Jasper)
Silicon Dioxide (SiO2)
Chert (Chalcedony/Jasper)
Microcrystalline Quartz (SiO2)
Chert (Arrowhead variety)
Chert (SiO2)
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Pink Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Chert (Nodule)
Microcrystalline Quartz (SiO2)
Glauconitic Sandstone
Glauconitic arenite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Glauconite (Sandstone or Shale)
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2)
Chert (Tan/Yellow variety)
Microcrystalline quartz (SiO2)
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Glauconitic Sandstone
Glauconitic Quartz-Wacke / Sandstone (Fe(II),Fe(III),Al,Mg)2-3(Si,Al)4O10(OH)2
Green Chert
Microcrystalline Quartz (SiO2)
Chert (Red/Pink Jasper subtype)
Silicon Dioxide (SiO2)
Chert (with Limestone/Dolomite host)
Microcrystalline Quartz (SiO2)
Limestone with Chert or Siltstone bands
Sedimentary carbonate rock (CaCO3) often with siliceous impurities
Chert (Field Stone)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Glauconitic Sandstone (Greensand)
Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
Greenstone / Serpentinite
Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)
Chert
Chert (Microcrystalline Quartz, SiO2)
Banded Chert
Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)
Chert (Flint)
Chert (Silicon Dioxide, SiO2)
Yellow Jasper
Jasper (Silica-rich Microcrystalline Quartz, SiO2)
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
Greenstone (Amygdaloidal Basalt)
Amygdaloidal Basalt (frequently composed of Plagioclase Feldspar, Pyroxene, and Olivine with Chlorite inclusions)
Yellow Jasper (Iron-stained Chert)
Silicon Dioxide (SiO2) with iron oxide (Limonite/Goethite) inclusions
Chert
Silicon dioxide (SiO2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Chert Breccia
Brecciated Chert (Microcrystalline Silica)
Banded Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
Chert (often referred to as Flint)
Chert (Microcrystalline or cryptocrystalline Quartz, SiO2)
Chert (specifically Flint or Jasper variant)
Chert (Siliceous rock composed of microcrystalline Quartz, SiO2)
Oolitic Chert
Silicon Dioxide (SiO2) with Oolitic texture
Siltstone with Weathering Rind
Siltstone (composed of microscopic quartz and clay minerals)
Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Eudialyte in Matrix
Na15Ca6(Fe,Mn)3Zr3(Si,Nb) (Si25O73) (OH,Cl,H2O)3
Banded Chert
Microcrystalline Quartz (SiO2)