Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Category
Organic Gemstone (Sedimentary Classification)
Browse organic gemstone (sedimentary classification) specimens identified by the Rock Identifier community.
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Jasper (specifically Polychrome or Desert Jasper)
Silicon Dioxide with impurities (SiO2)
Mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper (River Polished)
Jasper (Silicon Dioxide, SiO2)
sedimentary/mineral
Opal
Hydrated amorphous silica (SiO2·nH2O)
mineral
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Amber
Succinite (fossilized tree resin)
mineraloid
Amber
Succinite (Formula: C10H16O)
Organic Mineraloid
Amber
Succinite
Organic Mineral
Pyrite in Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Pink Rhodonite
Manganese Silicate (MnSiO3)
mineral
Nacre (Mother of Pearl)
Nacre (Biogenic Aragonite/Calcite composite, CaCO3)
mineral
Opal
Hydrated silica (SiO2·nH2O)
mineraloid
Clear Quartz Crystal
Quartz (Silicon Dioxide - SiO2)
mineral
![Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — Mineral](https://media.rockidentification.com/2fc8ee47-9aaf-4e01-9b51-63927847540c-thumbnail.jpg)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Mineral
Red Jasper
Silicon dioxide with hematite impurities (SiO2 + Fe2O3)
mineral
Specular Hematite with Pyrite
Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)
mineral
Pyrite (on Quartz matrix)
Iron Sulfide (FeS2)
mineral
Shungite
Non-crystalline carbon (Fullerenes)
metamorphic
Amber
Succinite
Organic Mineraloid
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Jasper
Jasper (Silicate mineral, SiO2)
sedimentary
Chert (and Flint)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Jasper (Silica/Quartz) - SiO2
sedimentary
Jasper
Silicon Dioxide (SiO2) - Impure Variety of Chert
sedimentary
Banded Agate (specifically Sardonyx or Carnelian Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Blue Celestite (with Galena)
Strontium sulfate (SrSO4) and Lead sulfide (PbS)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Garnet in Matrix
Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)
metamorphic
Quartz Crystal Point
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Asphalt
Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)
Sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
Mineral
Honey Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Botryoidal Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral