Diamonds that are mined by force and sold in the black market called what?

I'm pretty sure they're called Blood Diamonds.

Diamonds are mined by force and sold in black market called Blood Diamond.

Explanation:

The diamonds sold in the black market are called blood diamond because of large scale of bloodshed in this process. In the process of mining of those blood diamond, many were forced to work, gave rise to slavery and many were killed in the process.

Also, the gang war that threatened people to work forcefully and the mass casualties caused by gang war for the mining of the diamond gives significance to the name "Blood diamond".