Minerals and Granite dont work together.
TP to go with Granite would probably be a good idea, so you can actually move around.
You could take Minerals and drop out of granite when facing psi?
"Well, they found my diary today.
They were appropriately appalled
at the discovery of the eight victims
They're now putting it all together.
Women wrapped in silk
with one leg missing
Eight legs, one body, silk,
spider, brilliant!"
The trouble is, if dropping out of Granite, then above build has no fire, cold, energy, or negative protection.
Carnies do a fair amount of fire and energy damage iirc. So it would be barely worth it.
A fair number of Arachnos also do Psi, as do Rikti. In these cases, other damage types would be Smash/Lethal and Energy.
My inclination is that if you are getting Minerals, get Crystal armour aswell.
Although Im not sure "Perma Granite" is always the most efficient for a brute. They are damage dealers more than tanks, and Granite will cause problems dishing out damage due to direct -rech / -dam penalties, and problems building fury.
I think you have to decide how you are thinking of playing your Brute. If you are more "damagery" then I would tend to play out of Granite, and Id least get Crystal armour. If you are more "Tank-brute" then I'd get Taunt to aid fury building and make your self able to properly tank.
Id definately say get teleport.
EDIT: Given you have Boxing / Tough it looks like you are going for a "Tank-Brute" approach. Id say get taunt - no point staying alive if the rest of the team are dead. They wont thank you for it.
Thanks for the suggestions guys, but i thought about it and decided to go for build up for a couple of reasons, i rarely team because of the times i play so no taunt, i dont want teleport i hate it on my WS, i am normally fighting +3 foes and round up a couple of spawn groups in granite so i think the build up plus fury should put a big dent in the boss's health, anyway going to see how it goes and i still have a respec to use if i need to change.
Thanks again
Twisted
talkin from my experience, build up is a must for opening fights (it will simulate 50% fury bar), and also when u want to hit hard to that 'undesired' psi boss...
Better than get minerals, hit BU and Seismic, and see the big orange numbers get out of his head 
I respecced TP from my granite too, as u, and went for flight travel (AS is kwl in the chain btw). Also i got the presence pool for the extra controll it provides...
Well, im coming from dominators, so control is what i like to... Control, and big orangies ;D
Peace.
Hey all i have just hit lvl 41 on my stone/stone brute, and was wondering what would be the better power choice, build up or minerals ? or is there something else i should consider ? here's what i got so far
Stone Fist
Stone Mallet
Heavy Mallet
Seismic Smash
Fault
Tremor
Rock Armor
Stone Skin
Earths Embrace
Rooted
Mud Pots
Granite Armor
Hasten
Super Speed
Swift
Health
Stamina
Boxing
Tough
Recall Freind
Can minerals be up at the same time as granite ? not sure how much protection minerals will give against psionics but the only things really hurting me at the moment are carnie master illusionists.
Many thanks
Twisted