gemstone
Pearl
Calcium carbonate (CaCO3) in the form of aragonite
AI-generated identification · may be incorrectHardness 2.5-4.5. White to cream color, pearly luster, non-crystalline organic structure, opaque.
Identified More gemstone →
Explore Pearl in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness 2.5-4.5. White to cream color, pearly luster, non-crystalline organic structure, opaque.
Formation & geological history
Formed organically within the soft tissue of a living shelled mollusk, modern age, grown in marine or freshwater environments.
Uses & applications
Highly valued as a gemstone in jewelry, especially for earrings, necklaces, and rings.
Geological facts
Pearls are the only gemstones formed by living creatures, created as a defense mechanism against irritants.
Field identification & locations
Identify by the characteristic pearly luster and smooth surface; cultured pearls are commonly produced in farms globally.
More like this
Other gemstone specimens
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Amber
Succinite (Organic Gemstone)
mineral
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone