Some pics from my last excursions - very muddy conditions - it was necessary to use Wellingtons though
I believe this one is called quartz cactus (Amethyst ?)

close up

leaning against large rock

now larger crystal rocks, more likely Amethyst

more close

this is the one half of an huge rock I split into two pieces... ca 20 kg

close up of one cavity

and this is the other half

more close

details... I just love that pic

another large rock but not that huge though...

close up

and finally before it gets too boring for some of you... a conglomerate of crystals

perhaps interesting for the experts on that matter...?

Max