What is this black stone with gray & green swirls???

[Amethyst21]

I have purchased a candle from house of intuition, a spiritual store that’s online and has store locations. When my candle was done, it gave me two crystals, but one of them I couldn’t figure out what it was exactly.

I noticed it had this reflective glare in it. One angle it looks all black, and the other angle it looks gray and green.

Do you know what this stone is?

I’m sorry that I’m not able to have attachments on here, I think because I’m a newbie. But I can say that the swirls reminds me of agate.

[Sylmar]

I can post the picture for you if you send it to me by private message if you want to.