Which is more valuable, Japanese red coral or pearl?

1, get the difficulty. Red coral only grows around the Taiwan Province Strait, the Japanese Strait and the Baltic Strait. Due to the limitation of sea area, it is difficult to collect red coral, and it is very simple to collect pearls from mussels.

2. Growth time. The growth time of red coral is very slow, only one inch in 20 years and one kilogram in 300 years, while the growth speed of pearls is very fast, with a growth rate of 1 inch a year and only 5 to 6 kilograms in 200 years, so red coral is more valuable.