Ann- if you have a magnifying glass check it for hallmarks- one you've established the grade of gold it is ( usually 9, 10, 14, 18 or 22k) weigh it on your kitchen scales. Weigh each type seperately. so for instance you might end up with 10 grams of 9k gold and 5 grams of 18k etc or whatever. the go to this site and type in your quantities. It will give you a price. that is about 4% below the live price at the time you enter it. the live price changes everyday- so make sure you do it the day you are ready to go. A dealer will not offer you that price usually. Usually they will offer you about 20% less than that because they have to make a profit, but this site will give you a guide. then just go into places that advertise they buy gold and ask how much they will give you, armed with teir info. most places will knock money off ( rather than on for stones even if they are diamonds etc so be aware of that). Don't be afraid to haggle with them, they often don't offer their best price first- and ask for it per gram so you know where you are. Good luck:)
http://www.scrapgolduk.co.uk/