[quote=@Pirouette]
[@Lord Wraith] Speaking of power interactions... I read a bit more on X-Men as I haven't known much to start with but... Emma Frost's diamond form makes her immune to telepathy and Hollie has a similar power, so does she get immunity, too?
[/quote]

I would say it wouldn't. Emma's immunity in diamond form comes from her own telepathy. Which she is very skilled at - powerful enough to rival Jean Grey and Charles Xavier. 

Edit: My reasoning was incorrect - Emma just straight up isn't human in her diamond form. Hollie covers her body in gemstones, Emma becomes Diamonds. Telepathy should still work just fine on Hollie.