About 300 people on Sunday invaded a pit at Gemfields Group Ltd.’s ruby mine in Mozambique, which accounts for about half the world’s supply of the stones, executive officer Sean Gilbertson said.

The original rough stone weighed a staggering 101 carats when it was found last year in a mine in Mozambique, where there are vast ruby deposits in the north of the country. Polished rubies of ...

About 300 people invaded a pit at the Montepuez ruby mine owned by Gemfields Group in northeastern Mozambique on Sunday, CEO Sean Gilbertson said. Two people were shot by police, he said.