Good luck,
Hate to burst your bubble, but..........
What you have is, worthless rocks, NO visible gold!
Try e-bay, maybe someone there will buy mineral stained quartz, too many experts here.
Lets say that there is a possibility of some submicroscopic gold locked into your "ore" you would need an assay to establish any sort of value and that would be per metric ton of material. From what I see, you would be very lucky to have the ore pictured above to be worth even up to $100 per metric ton (2,204.62 lbs,) that would put the value at .22cents a lb.
Would cost way more than the ore is worth just to ship it.
Might look ok in your flower garden though.
If you have some that look like this, I'll buy them!
GG~