Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineraloid
Category
Man Made (Synthetic Rock)
Browse man made (synthetic rock) specimens identified by the Rock Identifier community.
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Diamond (Cluster Ring)
Carbon (C)
mineral
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
igneous
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Coquina
Bioclastic Limestone (Coquina)
sedimentary
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2)
sedimentary
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
mineral
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Asphalt
Asphalt concrete (engineered material, not a naturally occurring rock/mineral in this form)
Sedimentary
Sandstone
Arenite
sedimentary
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Coquina
Biogenic Limestone (mostly Calcium Carbonate, CaCO3)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Lapis Lazuli
Lapis Lazuli (a rock type, not a single mineral, composed primarily of lazurite, calcite, and pyrite)
Mineral, part of a rock
Chert (or Flint)
Chert (a cryptocrystalline variety of quartz, SiO2)
sedimentary
Green Glass Cullet / Recycled Glass
Amorphous Silicon Dioxide (SiO2) with various metal oxides
Man-made Glass (Not a natural rock or mineral)
Opal
Hydrous silicon dioxide (SiO2·nH2O)
mineral
Diamond
Carbon (C)
mineral
Rough Diamond
Diamond (pure Carbon, C)
mineral
Chert / Flint
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
mineral
Fossilized Shell in Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Red Sandstone
Arenite (with Iron Oxide / Hematite staining)
sedimentary
Chert (Common Opal/Jasper variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Jasper Variant likely)
Silicon Dioxide (SiO2)
Sedimentary Rock or Mineral (depending on origin and purity)
Chert (often called Flint)
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Cubic Zirconia (CZ) Jewelry
Zirconium dioxide (ZrO2)
mineral (synthetic)
Metal Alloy (Jewelry)
Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.
Man-made Material (jewelry, metal alloy)
Coquina
Coquina (Biogenic Limestone / CaCO3)
sedimentary
Chert (varieties include Flint and Mudstone)
Microcrystalline Silica (SiO2)
sedimentary
Chert (with Desert Varnish/Iron Stain)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Coquina / Fossiliferous Limestone
Coquina (composed primarily of Calcium Carbonate / CaCO3)
sedimentary
Diorite
Diorite
igneous
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Mineral
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)
N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)
Organic (if resin) or Synthetic (if glass); simulating Sedimentary or Metamorphic (for natural stones)
Rough Diamond
Diamond (pure Carbon, C)
mineral