In the absolute simplest sense, ethical gemstones are specimens that are removed from the ground and otherwise processed using eco-friendly techniques. Usually, the goal is to create the smallest possible impact on the environment. Ethically-mined crystals aren’t going to come from a strip mine or similar operation. Instead, the producer will use more environmentally conscious methods.
https://fiercelynxdesigns.com/blogs/articles/what-are-ethica...

OR

An ethically sourced gemstone is a stone that has been mined, cut, and polished following ethical standards. This includes ensuring that the miners receive a fair wage for their work and that they are not working in dangerous or unhealthy conditions. It also means ensuring that the environmental impact is neutral or positive.
https://blingadvisor.com/blog/ethically-sourced-gemstones/

It all depends on the context.
It is all up to your judgment.