There is a vendor not too far - Jubie Gadgetspring - where you can unload the stuff you get if you commit to farming.

Even herbalists and miners don't go there often, and everyon else has no business to be there. Kill everything on the U-shaped ridge and then go lap back around, the naga will have respawned by then.

It has got plenty of naga to kill and there is virtually no downtime.

It's the south-eastern ridge overlooking Duke Hydraxis. The location to farm: Ravencrest Monument in Azshara. This method can lead to frustrating chains of empty (of pearls) clams, but you also may get 2 in your first 2 clams.

You are not guaranteed to get a Golden Pearl in 200 clams.

You will probably not get 4 Black Pearls in 100 clams. The drop rate listed here is also misleading. It's like rolling a 200-sided die every time you open a clam and hoping from one specific number. The drop rate doesn't aggregate as you open the clams. This item has a frustratingly low drop rate that will seriously test your sanity. Commento di Vibriss DISCLAIMER: If you have the option to buy the pearls somewhere, strongly consider it before going to farm them.

Wow classic farming golden pearls