Dearest Ring (Gemstones)
Mixed Gemstones: Diamond (C), Emerald (Be3Al2Si6O18), Amethyst (SiO2), Ruby (Al2O3), Sapphire (Al2O3), Topaz (Al2SiO4(F,OH)2)
mineral
Category
Organic Gemstone (Often Associated With Sedimentary Sequences)
Browse organic gemstone (often associated with sedimentary sequences) specimens identified by the Rock Identifier community.
Learn about Organic Gemstone (Often Associated With Sedimentary Sequences) in the encyclopedia
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Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)
sedimentary
Serpentine
(Mg,Fe)3Si2O5(OH)4
metamorphic
Black Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Pyrite-bearing Schist
Pyritic Quartz-Mica Schist with FeS2 inclusion
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron inclusions
sedimentary
Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Tufa (Limestone)
Calcareous Tufa (CaCO3)
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Jasper with Agate Inclusions
Jasper (Silicon Dioxide, SiO2) with Chalcedony/Agate
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (CaCO3)
sedimentary
Chert (and Limestone)
Chert (consisting of Microcrystalline Quartz, SiO2)
sedimentary
Red Sandstone
Clastic Terrigenous Sedimentary Rock (typically Hematitic Quartz Arenite or Arkose)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Tufa (Calcareous Tufa)
Calcareous Tufa (CaCO3)
sedimentary
Honey Calcite Sphere
Calcium Carbonate (CaCO3)
mineral
Chert (Jasper/Common Opal transition)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (often called Flint when found in chalk)
Microcrystalline Quartz (SiO2)
sedimentary
Mica Schist
Mica Schist (primarily Muscovite or Biotite-rich sequence)
metamorphic
Tumbled Carnelian
Silicon Dioxide (Variety of Chalcedony), SiO2
gemstone
Amber (Copal)
Succiniferous Resin
mineraloid
Carnelian
Silicon Dioxide (Chalcedony variety), SiO2
gemstone
Fluorite
Calcium Fluoride (CaF2)
mineral
Red Sandstone
Arenite (composed primarily of Quartz and Iron Oxide)
sedimentary
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Chert (Flint)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Green Jasper
Microcrystalline Quartz (SiO2) with mineral inclusions
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
gemstone
Carnelian Agate
Silicon Dioxide (SiO2)
gemstone
Red Jasper
Cryptocrystalline Quartz (SiO2 with Iron oxide inclusions)
sedimentary
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Banding Agate / Jasper Heart
Silicon Dioxide (Chalcedony / Quartz), SiO2
gemstone
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Chert with Iron Staining
Microcrystalline quartz (SiO2) with iron oxide inclusions
sedimentary