The irregular-shaped one on the left is a brass tourist copy of a Spanish colonial "cob" style silver 8 reales, better known to most people as a "piece of eight" beloved by pirates. Pirate-themed tourist traps often sell souvenirs like this; I believe Readers Digest also mass-mailed out things like this to promote their Pirate books.
The ingot in the centre might be genuine, it might be another tourist souvenir. It claims to weigh 25.6 dwt, or 39.8 grams, so the simplest check for authenticity here is to weigh it and see if that's what it actually weighs. Or, take it to a jeweller and see if they think it really is 18k gold.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis