Precious Coral

Organic

3–4Hardness (Mohs)

CaCO₃Chemistry

1Known origins & mines

Deep-sea red coral fished for millennia across the Mediterranean and Pacific - Japanese Tosa and Ogasawara oxblood reds set the world standard for this protected organic gem.

Known origins & mines

Tosa Coral Grounds · Japan

Active mining · Legendary locality

Kochi prefecture's deep-water grounds for precious oxblood-red coral, Japan's coral capital since the Edo period.…

Mineral family: Organic

Pearl Ammolite