I have a few from Amazon.
This was my most recent 3MM Ladies Black Titanium Eternity Engagement Band, Wedding Ring with Black Pave Set Cubic Zirconia 6.5 https://www.amazon.com/dp/B016X2FGYI/ref=cm_sw_r_cp_api_M2A8xb19P3KFP but after a week or two, one of the stones fell out. I really liked the thinner band size.
I also have https://www.amazon.com/dp/B01589AVI8/ref=cm_sw_r_cp_api_y4A8xb0QM53BX which I liked the contrast between shiny/not shiny in the photos. It wasn't as noticeable in person. This was the first ring. Had it about a month before I got the Celtic dragon one.
I currently am wearing Queenwish 6mm Black Tungsten Carbide Ring Silvering Celtic Dragon https://www.amazon.com/dp/B01851LRHK/ref=cm_sw_r_cp_api_Y5A8xbK8S61PR it's comfortable, and I like the added weight of the tungsten. You can't really see the blue unless you're in bright lighting. I've had it for about 6months, and it still looks nice from daily wear.
I might get a thin titanium band without the cubic zircon, since I did like the thinner band and lighter weight. I was looking into marcasite, since it looks a little fancier, but I don't think it's dark enough.