My wife's folks (both passed away) spent a lot of time in central Oregon and on the high desert.  They came across this specimen maybe 20 years ago and have carted it around.  It is about 3 pounds and a little larger than my fist.  It is generally smooth.  I thought initially maybe Bull Quartz but now changing my mind.  We are down-sizing, so may be selling some of these to someone close by in Oregon with more room and greater passion.  Thoughts?

Just to modify Joe's suggestion a little bit -- I'd say you have breccia as opposed to conglomerate.  The difference being that the clasts are angular as opposed to smooth and rounded as you will find in conglomerates. It appears as though the clasts are made of quartz mainly from looking at the picture. Hard to say what the matrix is unless I can see it up close, but it does look like sandstone. Pretty rock though.