Dendritic Limestone
Calcite with Manganese Oxide (Manganese Dendrites)
sedimentary
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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Chert / Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (variously known as Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Brown Variety)
Silicon dioxide (SiO2)
sedimentary
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Limestone Pebble
Sedimentary carbonate rock (CaCO3)
sedimentary
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
Mineral
Chert Concretion / Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Coal (likely Bituminous or Lignite)
Organic Sedimentary Rock (Carbonaceous)
sedimentary
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Pink Tourmaline (Rubellite)
Elbaite - Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3OH
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Tumbled carnelian (likely orange chalcedony)
Carnelian, a cryptocrystalline variety of quartz; SiO₂, commonly colored by iron oxides
gemstone
Chalcedony (Common Agate)
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Seashell Fossil
Gastropoda fossil
fossil
Fossilized Shark Tooth (Partial) or Coprolite
Elasmobranchii (fossil) or Coprolite (trace fossil)
fossil
Sandstone
Arenite
sedimentary
Chert (Vuggy Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (Green Chert or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule fragment)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (with potentially high Feldspar/Arkose content)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Chert (specifically Flint or Nodular Chert)
Silicon Dioxide (SiO2)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
mineral
Blue Lace Agate
Chalcedony (SiO2) with trace minerals
mineral
Chert (Common Opal or Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood (Silicified Wood)
Silicified fossil wood (SiO2)
metamorphic
Serpentine
Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)
metamorphic
Amber
Succinite (C10H16O)
gemstone
Yellow Jasper
Silicon Dioxide (SiO2) with impurities, microcrystalline quartz
sedimentary
Banded Agate (Banded Chert / Jasper)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Red Zebra Jasper
Microcrystalline quartz (Chalcedony), SiO2
sedimentary
Red Jasper
Silicon Dioxide (SiO2), microcrystalline quartz variety
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Green Jasper
Microcrystalline Quartz (SiO2) with impurities
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Banded Jasper with Hematite or Quartz
Silicon Dioxide (SiO2) with impurities
sedimentary