For all intents and purposes, they are. The voluntary processes the diamond cartels adopted to supposedly reduce diamonds coming out of "conflict areas" are a joke. Most diamonds are mined under exploitive conditions, often with severe ecological impact, and the owners are almost without exception "blood on their hands" people even if one particular mine operates more ethically.
https://www.australiandiamondvalley.com.au/products/10ct-aut...
https://www.solidgold.com.au/argyle-red-diamonds.html
If you object to the mine owners (rio tinto) "blood on their hands" (from > 2,000 years of mining since Roman occupied Spain) then get rid of all your steel products as they're a major supplier of raw high grade iron ore (and copper, and ...)
https://www.riotinto.com/en/operations/australia/argyle
(NB: If you're going to downvote at least provide a comment as to why)
> Most diamonds are mined under exploitative conditions
You’ve clearly never been to a diamond mine. More than 70% of diamonds come out of “modern” countries like Australia, Canada, Russia, and South Africa. Botswana used their diamond bounty to teach hundreds of their citizens to grade/cut/polish the very stones mined in the country, ensuring tons of high skill jobs.
> the owners are almost without exception "blood on their hands" people
Well you’re only right on a loophole on this one - the Russian government owns the company that produces 40% of the world’s diamonds and it would be tough to argue Putin is blood-free.
You can Google this. Russia, Canada, Australia, South Africa, Botswana.(the contentious one would be DRC). These are regulated countries with labour rights and human rights. If they operate in these countries they are subject to those laws. May as well say you won't buy anything imported if you still feel there's ambiguity.
These are industries in these countries. Without these exports these people don't have jobs which feed them.