How to make this dull diamond shine?

Hey guys!
I’m new to UE4, I’m trying to understand how lighting works on mobile. I’ve spent many hours today reading documentation and answerhub and watching youtube tutorials, I still don’t understand how to make this sample mesh look good on Android?

It’s really dull on mobile. Should I use something else instead of point lights?
I compile it with OpenGL_ES3.1, there’s two stationary point lights on scene.

And is there a simple way to create an aura around diamond mesh?

Many thanks, guys!
I hope you’ll give me good direction!