I bought these as intro stones for my daughters, mother and grandmother. They all have issues and need a stone to start, me I have so many but I needed them to have a necklace for them to not take off. When I opened the package I held all of them in my hand and could feel that the stones are real (minus the watermelon one) and the power of them had my hand shaking.

I then went to each and told them to pick the stone that is calling to them. They all picked one that they indeed needed so I knew then as well that they were powerful. So this is a good batch of stones, and the black I believe to be a black tourmaline and not an onyx, but either way my daughter needed both.

I would definitely say that this product is worth it, buy it with the chains they suggested if you want them tighter or get longer chains.