Blue Swirls Foca
This is a really cool technique I recently learned that’s a lot easier than I expected it to be. This is the tutorial I used, I did it in soft glass instead of boro though, and I encased the entire bead at the end to give it even more of a 3D marbley type look. I used Double Helix Triton (I think you do need to use a silver glass to achieve the effect).