My brother and his wife bought a house in Northern Nevada and when they started hiking around their property my brother spotted a few interesting rocks and brought them to me because he knows how much I like this kind of thing. Top left is Mica, top right is quartz, bottom left I'm not really sure what that blue stone is yet (if you do, let me know) and bottom right is quartz.
And then my brother gave me this big rock with a bunch of quartz in it. It's hard to get a good picture to show you just how many quartz crystals are in this but it's a bunch.
There are a couple of big quartz crystals and many smaller ones. I added them to my collection of interesting rocks.