Hi, Sandy! I'm sorry you're having so much trouble finding more golden relics. I've tried the rain/storm scenario and it does work for me. But let's walk through it again, just to make sure you're doing it right...
First, you want to create rain. So, you combine the following potion:
Fish + Seawater + Stardust
Drop it on the ground. Wait for it to rain.
Next, once it's raining, combine the following potion:
Fish + Rainwater + Moondust
Drop it on the ground. You should hear
thunder, confirming that it's storming versus just raining.
Search the beach carefully for the relic. Since they're so small, they're easy to overlook. If you have any trees on your beach, they can sometimes hide the relic. I've had that happen.
If it doesn't work, I don't know what to suggest. Perhaps your version of the program has a glitch.
Do let me know if it works!!
Nite