>>756
Pic 1:
Marble is comprised of calcite crystals +/- any impurities. Since it's nearly momomineralic, it'll share many of the same properties as the crystal: if you put an acid like lemon juice or vinegar on it, it should vigorously effervesce. If it's dolomitic marble, it will only fizz weakly and only if powdered.
2 on the right in the 2nd row might be feldspars but hard to tell in your pic
"granite" in the upper left is unlikely to be a granite. I'd guess it's probably going to plot as something like a quartz monzonite or quartz monzodiorite. Could be it's a true granite but I'm guessing it's not.
Pic #2:
That's a chunk of gneiss. You've got a biotite-rich top and a quartzofeldspathic bottom. Probably formed from a sedimentary protolith based on how much aluminum that's probably got in it and at somewhere around 600-800 C
Pic 3:
That's more likely a chunk of pegmatitic quartz. Do the acid test from pic 1 and check the hardness - quartz is harder than steel, calcite/dolomite are not. The shiny bits in there look like muscovite.