Ammolite

Precious gem Organic

3.5–4.5Hardness (Mohs)

CaCO₃ (aragonite shell)Chemistry

2Known origins & mines

Iridescent gem shell of 71-million-year-old ammonites from Alberta's Bearpaw Formation - the only commercial source on Earth. Red-green-blue play of color makes every stone unique; official gemstone of Alberta.

Known origins & mines

St Mary River Ammolite Banks · Canada

Active mining · Legendary locality

The only commercial ammolite source on Earth: iridescent ammonite shell mined along Alberta's St Mary River since 1981.…

Lethbridge Ammolite Occurrences · Canada

Active mining · Minor occurrence

Bearpaw Formation exposures around Lethbridge yielding gem ammonites - core of Korite's mining leases.…

Mineral family: Organic

Pearl Precious Coral