Odds are that your specimen is not a gold ore. I am a geologist and have been on too many wild goose chases here. Pyrite, chalcopyrite, mica are the usual culprits.
To quell your interest have the rock assayed as assays are pretty inexpensive.
Now if it actually did contain some low level gold ore e.g. .012 grams/per ton the odds of you coming into a "gold mine" in this environmentally political correct country are remote. Too many obstacles lay in your path. The Sierra Club would probably protest around your home and government environmentalists would descend like locusts if you ever wanted to "develop" your gold mine.
If your specimen did contain trace amounts of gold do like what some folks are doing. Sell each piece on E-Bay as gold ore or gold specimen and make some money. Occasionally people go crazy on a specimen if it is rich in yellow color. I collect gold and mineral samples and occasionally buy off E-Bay and have a good laugh from time to time. Some of the smart miners are listing their ore samples there(not free milling gold ore)which have beautiful yellow colors which are mainly pyrite, chalcopyrite,etc with trace of gold. The miners are upfront even giving the assays eg 1/4 ounce per ton but people buy these specimens at good prices thinking that they are choke full of gold. They probably make more money selling their low level gold ore to the public than they would having the ore processed at 1/4 ounce per ton.
George