gemstone
Polished pink opal (likely common opal)
Opal, hydrated amorphous silica (SiO₂·nH₂O)
AI-generated identification · may be incorrectSmooth, opaque-to-translucent pale pink body with a waxy-to-vitreous polish; hardness about 5.5–6.5 Mohs, no cleavage, and no crystal structure. The image is too soft to confirm the material or identify any play-of-color.
Identified More gemstone →
Explore Polished pink opal (likely common opal) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Smooth, opaque-to-translucent pale pink body with a waxy-to-vitreous polish; hardness about 5.5–6.5 Mohs, no cleavage, and no crystal structure. The image is too soft to confirm the material or identify any play-of-color.
Formation & geological history
Forms when silica-rich water deposits hydrated silica in cavities and fractures, commonly in volcanic rocks or sediment. Deposits are generally geologically young, though opal can form across many ages.
Uses & applications
Used for cabochons, beads, and decorative objects; softer than many gemstones, so jewelry benefits from protective settings.
Geological facts
Pink common opal usually lacks the shifting spectral flashes characteristic of precious opal.
Field identification & locations
A pink, smooth cabochon-like specimen is consistent with polished opal, but the photo alone cannot rule out another stone or imitation. Notable sources include Peru, Australia, Mexico, and the United States.
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
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone