Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Category
Browse mineral, organic gemstone specimens identified by the Rock Identifier community.
Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Amber
Fossilized Tree Resin (Generic formula roughly C10H16O)
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
Pearl
Calcium Carbonate (Aragonite/Calcite mixed with Conchiolin), CaCO3
Moss Agate
Chalcedony (Silicon Dioxide - SiO2) with inclusions
Black Pearl (Tahitian or Irradiated Type)
Organic gemstone (Calcium Carbonate with Conchiolin Binding)
Petrified Wood
Silicified Wood (SiO2)
Pearl (nacre)
Calcium Carbonate (mostly CaCO3 as Aragonite) and Conchiolin
Amber
Succinite (formula varies, primarily C10H16O)
Jasper (Brown Iron-Rich Variety)
Silicon Dioxide (SiO2) with Fe2O3 (Iron Oxide/Crystalline Quartz)
Black Pearl (Tahitian-style Cultured Pearl)
Calcium Carbonate (Aragonite) with Conchiolin (CaCO3)
Amber
Succinite (fossilized resin)
Pearl
Aragonite / Calcium Carbonate (CaCO3)
Chert / Flint
Silicon Dioxide (SiO2)
Chert (Flint Nodular)
Chert (Silicon dioxide, SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Pearl
Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)
Banded Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
Chalcedony
Cryptocrystalline Quartz (SiO2)
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
Petrified Wood
Silicified wood (principally SiO2)
Petrified Wood (Silicified Wood)
Silicified fossil wood (SiO2)
Pink Opal
Amorphous Hydrous Silica (SiO2·nH2O)
Amber
Succinite (organic mineraloid); Chemical formula: C10H16O
Petrified Wood
Silicified Wood (primarily SiO2)
Amber
Succinite (fossilized resin, C10H16O)
Jasper
Jasper (Silicon Dioxide, SiO2)
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
Chert Nodule (Fossiliferous Chert)
Microcrystalline Quartz (SiO2)
Yellow Jasper (Mookaite style)
Silicon Dioxide (SiO2) with Goethite/Hematite inclusions
Amber
Succinite (C10H16O)
Amber
Succinite (C10H16O)
Amber
Succinite (Fossilized Tree Resin), C10H16O
Petrified Wood
Silicified Wood (primarily SiO2)
Chert Nodule
Microcrystalline Silica (SiO2)
Amber
Succinite
Baltic Amber (Butterscotch or Egg Yolk Variety)
Succinite (chemical formula: C10H16O)
Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Herkimer Diamond
Quartz (Silica - SiO2)
Bamboo Leaf Jasper
Silicified Siltstone or Jasper (SiO2)
Pearl
Organic Mineraloid (CaCO3 + Conchiolin)