It is tonga branch. I got it at the shark reef in silverdale. He ordered 100# and it was pretty much gone when we got there. While i was there, he called his supplier to see if he could place another order and they told him it was all gone. I guess it was/is a test run that the tongan government decided to try. He said the email he got was saying that the tongans will let the rock be harvested as long as it doesnt start affecting their eco system. So this was a test run. Hope it doesnt affect it to much. Its been a LONG time since its been available.