ZBrushCentral

How to model the following jewelry?

Hi,
I’m going to model this jewelry in Zbrush. I’m a newbie and keeping practice to get mastered in it. What is the best starting point for this?
Should I use Dynamesh? Dynamesh usually creates blured and uneven appearance.
Do I need to download customized brushes for jewelry works?
Please guide me.
Thanks.

I would be making Insert Meshes of the individual pieces and place them on the ring. Or just make them manually and use the Matchmaker brush to match their shape to that of the main ring.