Hahaha I didn't realise wally..same house..*click*
I'd highly reccomend searching the gullies higher by chasing the quartz upstream. You should start finding cystal points if your lucky.
At the same time..I'm nearly doubting my granite text above thinking it could also be quartz blow but I think I see a mica sparkle so ill still say granite.. you'd probably know the answer to that.
Sometimes quartz can seem like smokey as well if it has a dark rock behind it..but to me..that's real smokey.
If its smokey in granite you have chances of finding large crystals, pegmatites, amethyst and others depending on the compositions there