Related to my other question.
What would be best conditions for a natural super colony of pearl oysters and the best conditions for them to produce pearls naturally.
Shallow or deep waters?
Slowly decreasing, long shore or rocky waters?
Periodic currents around the island or continuous current? (To increase the chance of sand getting into the clams)
Coud it be combined with a coral reef?
Reefs forming circles around the island or a star / squid like layout?
I would also like if the conditions allowed the pearls to wash up to the beach.
You can have anything you want as long as it can create a paradise for the clams. The conditions don't have to be caused naturally. I have a lot of handwavium to make it happen.
(If it would be impossible to do with just one island consider if several islands could make enough glitter. And then I'll join it together with MAGIC or something)