Does gold jewelry hold it's value like coins or bullion?

Yes and no. Gold (and silver) jewelry are usually sold at a much, much higher premium when you buy it than coins and bullion and when sold, they are sold for just a bit more than scrap value (depending on what type of jewelry of course, some sell for much more). For example, if you buy a ring with $100 worth of gold in it for $500 new, you might only get $150 or $200 if you sold it depending on the buyer. Unlike coins and bullion jewelry is subjective, what someone likes, others might hate and that affects the price that people will pay for it. If you are buying jewelry at (or below!) the price of the gold that is in it, it will keep its value so long as the gold price doesn't drop. However, if you are paying quite a bit more than the gold content of the jewelry, most likely it will not keep all of its value when you resell it.