Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)
Category
Mineral And Organic Gemstone
Browse mineral and organic gemstone specimens identified by the Rock Identifier community.
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Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
Mineral (Variety of Chalcedony)
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chalcedony (Common Agate)
Silicon Dioxide (SiO2)
mineral
Amber
Fossilized plant resin; primarily organic terpenoid compounds (not a mineral)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Black Pearl (Tahitian-style Cultured Pearl)
Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)
mineral
Pearl
Calcium carbonate (Aragonite/Calcite) - CaCO3
gemstone
Amber (Copal)
Succiniferous Resin
mineraloid
Petrified Wood
Silicified wood (principally SiO2)
sedimentary
Jasper (Brown Iron-Rich Variety)
Silicon Dioxide (SiO2) with Fe2O3 (Iron Oxide/Crystalline Quartz)
sedimentary
Petrified Wood (Silicified Wood)
Silicified fossil wood (SiO2)
metamorphic
Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin (CaCO3)
mineral
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Fossilized Coral (Petrified Coral)
Lithostrotionella (example genus) / Scleractinia
fossil
Chalcedony (Common Opal variant)
Silicon dioxide (SiO2) with varying levels of hydration
mineral
Sandstone
Arenite
sedimentary
Pink Opal
Hydrated Silica (SiO2·nH2O) with Palygorskite/Sepiolite inclusions
gemstone
Pink Opal
Amorphous Hydrous Silica (SiO2·nH2O)
mineral
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Succinited (fossilized tree resin)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Cherry Creek Jasper (also known as Red Creek Jasper or Cherry Creek Agate)
Jasper, microcrystalline quartz (SiO₂)
Sedimentary Rock
Banded Agate (Dyed)
SiO2 (Silicon Dioxide / Microcrystalline Quartz)
mineral
Tumbled brown jasper (likely common jasper or chert)
Microcrystalline quartz, SiO₂, chiefly chalcedony/quartz with iron-oxide impurities
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone
Limestone with embedded fossil cross-section
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Pearl
Organic Mineraloid (CaCO3 + Conchiolin)
mineral
Amber
Succinite (organic mineraloid); Chemical formula: C10H16O
mineral
Chert (Flint Nodular)
Chert (Silicon dioxide, SiO2)
sedimentary
Amber
Succinite (fossilized resin, C10H16O)
mineral
Quartz and Limestone Grouping
Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)
mineral
Amber
Succinite (Fossilized Tree Resin)
fossil
Banded Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
mineral
Shale
Laminated Fissile Pelite
sedimentary
Amber
Succinates (Organic Fossilized Resin)
mineraloid
Petrified Wood
Silicified Wood (SiO2)
fossil