Amber
Succinates (Fossilized Tree Resin)
mineraloid
Category
Organic Gemstone (Sedimentary Associations)
Browse organic gemstone (sedimentary associations) specimens identified by the Rock Identifier community.
Amber
Succinite (C10H16O)
mineral
Turquoise
Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Chert (often called Flint when dark)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Carnelian
Silicon dioxide / Chalcedony (SiO2)
mineral
Carnelian (Red Agate)
Silicon dioxide (SiO2) with iron oxide impurities
mineral
Carnelian
SiO2 (Microcrystalline Quartz / Chalcedony)
mineral
Carnelian
Carnelian (SiO2 - Silicon Dioxide)
mineral
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Fossilized Gastropod (Snail)
Class Gastropoda (internal mold or 'steinkern')
sedimentary
Milky Quartz / Rose Quartz fragment
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Clear Quartz
SiO2 (Silicon Dioxide)
mineral
Feldspar (specifically Orthoclase or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Carnelian
Carnelian (SiO2)
mineral
Kidney Stone
Calcium Oxalate (CaC2O4), Uric Acid, or Struvite
mineral
Coral (Precious Coral)
Corallium rubrum (Red Coral), Paracorallium japonicum (Momo Coral), Pleurocorallium elatius (Sardinian Coral), various other species within the Corallidae family. Chemically, it's primarily Calcium Carbonate (CaCO 3 ).
Mineral, Organic Gemstone
Anthracite Coal
Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides
sedimentary
Jasper
Silicon dioxide (SiO2) with iron impurities
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)
sedimentary
Green Chalcedony (likely Green Agate or Chrysoprase)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Mineral
Carnelian
Carnelian (Silicon Dioxide - SiO2)
mineral
Carnelian Agate
Carnelian (Silicon Dioxide, SiO2)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Almandine Garnet
Iron aluminum silicate - Fe3Al2(SiO4)3
metamorphic
Red Jasper
CHERT (SiO2) with Hematite impurities
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (Botryoidal Agate)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (SiO2)
mineral
Turquoise (possible Dyed Magnesite/Howlite)
CuAl6(PO4)4(OH)8·4H2O
mineral
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral