Before the Horse Races, any year, save up for the Fall Horse Races.

Go to the 7-10 levels of the mine with a basket and gather as much orthalac or adimantine ores and ship them for 5 to 10 days to get as much money as you can.

Then once the races are there, bring your basket and bet 10-15 tickets on each horse, you'll never kow who wins unless you can find another cheat for that, I'm trying to find out how you get to know

Anyway, after the races exchange all the tickets you've earned for necklaces and ship all the necklaces you get.