A little bit of advice please

[Mila Jewellery]

I want to learn how to set stones so I thought I would start with something fairly big and not too expensive!! I spotted this dichroic glass cab - my pics don't do it justice, it's really pretty. Anyway, I want to make it into a pendant, rubover setting ideally with an open back but wanted a few pointers on the best way of doing this, or any other suggestions for setting it.

[geti-titanium]

Crikey! I think I would start with a nice 3mm round cz